Magnetic Definition and 1000 Threads

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It may not display this or other websites correctly.<br />You should upgrade or use an <a href="https://www.google.com/chrome/" target="_blank" rel="noopener">alternative browser</a>.</div> <div class="p-body-main "> <div class="p-body-contentCol"></div> <div class="p-body-content"> <div class="p-body-pageContent"> <div class="p-breadcrumbs--parent "> <ul class="p-breadcrumbs " itemscope itemtype="https://schema.org/BreadcrumbList"> <li itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"> <a href="https://www.physicsforums.com/" itemprop="item"> <span itemprop="name">Forums</span> </a> <meta itemprop="position" content="1" /> </li> <li itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"> <a href="/tags/" itemprop="item"> <span itemprop="name">Tags</span> </a> <meta itemprop="position" content="2" /> </li> </ul> </div> <div class="p-body-header"> <div class="p-title "> <h1 class="p-title-value">Magnetic Definition and 1000 Threads</h1> </div> </div> <div class="tabs tabs--standalone"> <div class="hScroller" data-xf-init="h-scroller"> <span class="hScroller-scroll"> <a class="tabs-tab is-active" href="/tags/magnetic/">Recent contents</a> <a class="tabs-tab " href="/tags/magnetic/wiki">View information</a> <a class="tabs-tab " href="/tags/magnetic/top-users">Top users</a> </span> </div> </div> <div class="block" data-xf-init="" data-type="" data-href="/inline-mod/"> <div class="block-container"> <ol class="block-body"> <li class="block-row block-row--separated js-inlineModContainer" data-author="Jesper12"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/jesper12.759783/" class="avatar avatar--s" data-user-id="759783" data-xf-init="member-tooltip"> <img src="/data/avatars/s/759/759783.jpg?1739990930" srcset="/data/avatars/m/759/759783.jpg?1739990930 2x" alt="Jesper12" class="avatar-u759783-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/calculating-magnetic-field-outside-a-solenoid.1078669/">Calculating magnetic field outside a solenoid</a> </h3> <div class="contentRow-snippet">import numpy as np # Constants mu_0 = 4 * np.pi * 1e-7 # Vacuum permeability (T m/A) # Solenoid Parameters R = 0.007 # Radius of the solenoid (meters) L = 0.074 # Length of solenoid (meters) N = 1709 # Number of turns num_segments = 500 # Increased for better accuracy I = 1.01 # Current in...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/jesper12.759783/" class="username " dir="auto" data-user-id="759783" data-xf-init="member-tooltip">Jesper12</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2025-02-19T12:52:27-0600" data-time="1739991147" data-date-string="Feb 19, 2025" data-time-string="12:52 PM" title="Feb 19, 2025 at 12:52 PM">Wednesday, 12:52 PM</time></li> <li> <dl class="tagList tagList--thread-1078669 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/biot-savart/" data-xf-init="preview-tooltip" data-preview-url="/tags/biot-savart/preview" class="tagItem tagItem--tag_biot-savart" dir="auto"> Biot-savart </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/solenoid/" data-xf-init="preview-tooltip" data-preview-url="/tags/solenoid/preview" class="tagItem tagItem--tag_solenoid" dir="auto"> Solenoid </a> </span> </dd> </dl> </li> <li>Replies: 15</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="synch"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/synch.587434/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="587434" data-xf-init="member-tooltip" style="background-color: #3b2b2b; color: #9d7b7b"> <span class="avatar-u587434-s" role="img" aria-label="synch">S</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/power-from-global-loop-power-cable.1078634/"><span class="prefix basic" dir="auto">B</span><span class="label-append"> </span>Power from global loop power cable ?</a> </h3> <div class="contentRow-snippet">Just a thought ... Given that the earths magnetic field has a stream of small changes, would a power transmission line forming a loop around the equator generate useful power ? Not exactly economic of course. Maybe just circumnavigating the arctic circle would be enough ?</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/synch.587434/" class="username " dir="auto" data-user-id="587434" data-xf-init="member-tooltip">synch</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2025-02-17T19:53:00-0600" data-time="1739843580" data-date-string="Feb 17, 2025" data-time-string="7:53 PM" title="Feb 17, 2025 at 7:53 PM">Monday, 7:53 PM</time></li> <li> <dl class="tagList tagList--thread-1078634 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/earth/" data-xf-init="preview-tooltip" data-preview-url="/tags/earth/preview" class="tagItem tagItem--tag_earth" dir="auto"> Earth </a> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 1</li> <li>Forum: <a href="/forums/classical-physics.61/">Classical Physics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="SredniVashtar"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/srednivashtar.257459/" class="avatar avatar--s" data-user-id="257459" data-xf-init="member-tooltip"> <img src="/data/avatars/s/257/257459.jpg?1431190538" srcset="/data/avatars/m/257/257459.jpg?1431190538 2x" alt="SredniVashtar" class="avatar-u257459-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/visualizing-fields-around-coils-statics-and-magnetostatics.1078481/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>Visualizing fields around coils (statics and magnetostatics)</a> </h3> <div class="contentRow-snippet">I am looking for some neat way to visualize various fields in the space around the usual electronic components: a straight wire, a single turn circular coil, a multi-turn finite solenoid, and an infinitely long cylindrical solenoid. I can get the expression, either in their analytical exact...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/srednivashtar.257459/" class="username " dir="auto" data-user-id="257459" data-xf-init="member-tooltip">SredniVashtar</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2025-02-09T17:38:15-0600" data-time="1739144295" data-date-string="Feb 9, 2025" data-time-string="5:38 PM" title="Feb 9, 2025 at 5:38 PM">Feb 9, 2025</time></li> <li> <dl class="tagList tagList--thread-1078481 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/electric/" data-xf-init="preview-tooltip" data-preview-url="/tags/electric/preview" class="tagItem tagItem--tag_electric" dir="auto"> Electric </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/visualization/" data-xf-init="preview-tooltip" data-preview-url="/tags/visualization/preview" class="tagItem tagItem--tag_visualization" dir="auto"> Visualization </a> </span> </dd> </dl> </li> <li>Replies: 5</li> <li>Forum: <a href="/forums/electromagnetism.302/">Electromagnetism</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="mad mathematician"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/mad-mathematician.753699/" class="avatar avatar--s" data-user-id="753699" data-xf-init="member-tooltip"> <img src="/data/avatars/s/753/753699.jpg?1736545471" srcset="/data/avatars/m/753/753699.jpg?1736545471 2x" alt="mad mathematician" class="avatar-u753699-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/magnetic-monopoles-non-existence.1067999/"><span class="prefix advanced" dir="auto">A</span><span class="label-append"> </span>Magnetic Monopole's (non)existence</a> </h3> <div class="contentRow-snippet">Assume that one day will find axiomatics for physical theories. Will magnetic monopoles (non)existence be part of the axioms (postulates) or their (non)existence be derived from the axioms? How can one prove/disprove their physical existence? If they are being observed by direct/indirect...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/mad-mathematician.753699/" class="username " dir="auto" data-user-id="753699" data-xf-init="member-tooltip">mad mathematician</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2025-01-09T09:41:49-0600" data-time="1736437309" data-date-string="Jan 9, 2025" data-time-string="9:41 AM" title="Jan 9, 2025 at 9:41 AM">Jan 9, 2025</time></li> <li> <dl class="tagList tagList--thread-1067999 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/axioms/" data-xf-init="preview-tooltip" data-preview-url="/tags/axioms/preview" class="tagItem tagItem--tag_axioms" dir="auto"> Axioms </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/monopole/" data-xf-init="preview-tooltip" data-preview-url="/tags/monopole/preview" class="tagItem tagItem--tag_monopole" dir="auto"> Monopole </a> </span> </dd> </dl> </li> <li>Replies: 10</li> <li>Forum: <a href="/forums/beyond-the-standard-models.66/">Beyond the Standard Models</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="Lambda96"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/lambda96.696125/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="696125" data-xf-init="member-tooltip" style="background-color: #cc6666; color: #602020"> <span class="avatar-u696125-s" role="img" aria-label="Lambda96">L</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/calculate-e-and-b-fields-when-given-a.1066960/">Calculate E and B fields when given A</a> </h3> <div class="contentRow-snippet">Hi I'm not sure if I calculated the magnetic field from task a) correct? for calculatin ##\vec{B}## i used, the formular ##\vec{B}=\vec{\nabla} x \vec{A}## $$\vec{B}=\left(\begin{array}{c} \frac{\partial}{\partial x_1} \\ \frac{\partial}{\partial x_2} \\ \frac{\partial}{\partial x_3}...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/lambda96.696125/" class="username " dir="auto" data-user-id="696125" data-xf-init="member-tooltip">Lambda96</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-11-16T05:24:36-0600" data-time="1731756276" data-date-string="Nov 16, 2024" data-time-string="5:24 AM" title="Nov 16, 2024 at 5:24 AM">Nov 16, 2024</time></li> <li> <dl class="tagList tagList--thread-1066960 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/calculation/" data-xf-init="preview-tooltip" data-preview-url="/tags/calculation/preview" class="tagItem tagItem--tag_calculation" dir="auto"> Calculation </a> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 5</li> <li>Forum: <a href="/forums/advanced-physics-homework-help.154/">Advanced Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="pete94857"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/pete94857.750014/" class="avatar avatar--s" data-user-id="750014" data-xf-init="member-tooltip"> <img src="/data/avatars/s/750/750014.jpg?1718400253" srcset="/data/avatars/m/750/750014.jpg?1718400253 2x" alt="pete94857" class="avatar-u750014-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/field-strength-of-permanent-magnets-inverse-square-or-inverse-cube.1066949/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>Field Strength of Permanent Magnets -- Inverse square or inverse cube?</a> </h3> <div class="contentRow-snippet">I've just seen a video made by Dr. Usha Singh associate physics professor. It showed a practical experiment giving results that the changing field is directly proportional to the inverse square law. It involves two bar magnets. I do however have some conflicting information. When analysing...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/pete94857.750014/" class="username " dir="auto" data-user-id="750014" data-xf-init="member-tooltip">pete94857</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-11-15T13:13:36-0600" data-time="1731698016" data-date-string="Nov 15, 2024" data-time-string="1:13 PM" title="Nov 15, 2024 at 1:13 PM">Nov 15, 2024</time></li> <li> <dl class="tagList tagList--thread-1066949 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/inverse-square-law/" data-xf-init="preview-tooltip" data-preview-url="/tags/inverse-square-law/preview" class="tagItem tagItem--tag_inverse-square-law" dir="auto"> Inverse square law </a> <a href="/tags/magnesium/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnesium/preview" class="tagItem tagItem--tag_magnesium" dir="auto"> Magnesium </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/permanent-magnets/" data-xf-init="preview-tooltip" data-preview-url="/tags/permanent-magnets/preview" class="tagItem tagItem--tag_permanent-magnets" dir="auto"> permanent magnets </a> </span> </dd> </dl> </li> <li>Replies: 9</li> <li>Forum: <a href="/forums/classical-physics.61/">Classical Physics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="EvAngeline"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/evangeline.754341/" class="avatar avatar--s" data-user-id="754341" data-xf-init="member-tooltip"> <img src="/data/avatars/s/754/754341.jpg?1730236965" srcset="/data/avatars/m/754/754341.jpg?1730236965 2x" alt="EvAngeline" class="avatar-u754341-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/is-this-a-meteorite.1066600/"><span class="prefix purple" dir="auto">Stargazing</span><span class="label-append"> </span>Is this a meteorite?</a> </h3> <div class="contentRow-snippet">Slightly magnetic extremely heavy seems to have a crust has green glass like particles under magnifying glass. Just extremely curious on what it might be?</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/evangeline.754341/" class="username " dir="auto" data-user-id="754341" data-xf-init="member-tooltip">EvAngeline</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-10-29T16:56:56-0500" data-time="1730239016" data-date-string="Oct 29, 2024" data-time-string="4:56 PM" title="Oct 29, 2024 at 4:56 PM">Oct 29, 2024</time></li> <li> <dl class="tagList tagList--thread-1066600 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/meteorite/" data-xf-init="preview-tooltip" data-preview-url="/tags/meteorite/preview" class="tagItem tagItem--tag_meteorite" dir="auto"> Meteorite </a> </span> </dd> </dl> </li> <li>Replies: 8</li> <li>Forum: <a href="/forums/astronomy-and-astrophysics.71/">Astronomy and Astrophysics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="fagricipni"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/fagricipni.733151/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="733151" data-xf-init="member-tooltip" style="background-color: #85c2e0; color: #246b8f"> <span class="avatar-u733151-s" role="img" aria-label="fagricipni">F</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/what-is-the-magnetic-equivalent-to-the-coulomb.1065685/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>What is the magnetic equivalent to the Coulomb?</a> </h3> <div class="contentRow-snippet">For electric charges the relation is ##F=k\frac{q_1q_2}{r^2}##, where ##k=\frac{1}{4\pi\varepsilon_0}##. It seems to me that for the (hypothesized) magnetic monopole one could write an equivalent ##F=n\frac{p_1p_2}{r^2}##. I have replaced the q's with p's for "pole strength", and k with n --...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/fagricipni.733151/" class="username " dir="auto" data-user-id="733151" data-xf-init="member-tooltip">fagricipni</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-09-14T12:51:20-0500" data-time="1726336280" data-date-string="Sep 14, 2024" data-time-string="12:51 PM" title="Sep 14, 2024 at 12:51 PM">Sep 14, 2024</time></li> <li> <dl class="tagList tagList--thread-1065685 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/coulomb/" data-xf-init="preview-tooltip" data-preview-url="/tags/coulomb/preview" class="tagItem tagItem--tag_coulomb" dir="auto"> Coulomb </a> <a href="/tags/force/" data-xf-init="preview-tooltip" data-preview-url="/tags/force/preview" class="tagItem tagItem--tag_force" dir="auto"> Force </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 6</li> <li>Forum: <a href="/forums/classical-physics.61/">Classical Physics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="Sodagit"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/sodagit.752362/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="752362" data-xf-init="member-tooltip" style="background-color: #cc3333; color: #f0c2c2"> <span class="avatar-u752362-s" role="img" aria-label="Sodagit">S</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/container-in-an-mri-room.1065392/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>Container in an MRI room</a> </h3> <div class="contentRow-snippet">So hypothetically you bring a container into an MRI room. Inside the container is a USB drive, a crypto hardware token, an electronic tablet, and a Walkman. Then you run the room's MRI machine, which has a magnetic field strength of 3 Teslas. What kind of container could prevent any...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/sodagit.752362/" class="username " dir="auto" data-user-id="752362" data-xf-init="member-tooltip">Sodagit</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-08-30T22:37:54-0500" data-time="1725075474" data-date-string="Aug 30, 2024" data-time-string="10:37 PM" title="Aug 30, 2024 at 10:37 PM">Aug 30, 2024</time></li> <li> <dl class="tagList tagList--thread-1065392 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/container/" data-xf-init="preview-tooltip" data-preview-url="/tags/container/preview" class="tagItem tagItem--tag_container" dir="auto"> Container </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/shielding/" data-xf-init="preview-tooltip" data-preview-url="/tags/shielding/preview" class="tagItem tagItem--tag_shielding" dir="auto"> Shielding </a> </span> </dd> </dl> </li> <li>Replies: 12</li> <li>Forum: <a href="/forums/other-physics-topics.111/">Other Physics Topics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="yashraj"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/yashraj.750949/" class="avatar avatar--s" data-user-id="750949" data-xf-init="member-tooltip"> <img src="/data/avatars/s/750/750949.jpg?1721205546" srcset="/data/avatars/m/750/750949.jpg?1721205546 2x" alt="yashraj" class="avatar-u750949-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/does-a-time-varying-magnetic-field-in-vacuum-produce-electric-field-or-not.1064985/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>Does a time varying magnetic field in vacuum produce electric field or not?</a> </h3> <div class="contentRow-snippet">Suppose there is very long current carrying wire. A charged particle is present somewhere around it. The current in the wire varies with time, thus by biot-savart's law there should be time varying magnetic field. I want to know that will this time varying magnetic field produce electric field...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/yashraj.750949/" class="username " dir="auto" data-user-id="750949" data-xf-init="member-tooltip">yashraj</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-08-10T04:00:50-0500" data-time="1723280450" data-date-string="Aug 10, 2024" data-time-string="4:00 AM" title="Aug 10, 2024 at 4:00 AM">Aug 10, 2024</time></li> <li> <dl class="tagList tagList--thread-1064985 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/charged/" data-xf-init="preview-tooltip" data-preview-url="/tags/charged/preview" class="tagItem tagItem--tag_charged" dir="auto"> Charged </a> <a href="/tags/electric/" data-xf-init="preview-tooltip" data-preview-url="/tags/electric/preview" class="tagItem tagItem--tag_electric" dir="auto"> Electric </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 7</li> <li>Forum: <a href="/forums/classical-physics.61/">Classical Physics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="Adrian59"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/adrian59.187004/" class="avatar avatar--s" data-user-id="187004" data-xf-init="member-tooltip"> <img src="/data/avatars/s/187/187004.jpg?1496499414" srcset="/data/avatars/m/187/187004.jpg?1496499414 2x" alt="Adrian59" class="avatar-u187004-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/calculating-higher-order-terms-for-electron-anomalous-magnetic-moment.1064881/"><span class="prefix advanced" dir="auto">A</span><span class="label-append"> </span>Calculating higher order terms for Electron Anomalous Magnetic Moment</a> </h3> <div class="contentRow-snippet">Does anyone know how to calculate the coefficients for higher order (sixth and beyond) terms for the electron anomalous magnetic moment? I have a clear understanding of calculating the Schwinger term, but beyond that I cannot find anything in the usual QFT textbooks. The usual papers often...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/adrian59.187004/" class="username " dir="auto" data-user-id="187004" data-xf-init="member-tooltip">Adrian59</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-08-05T11:01:40-0500" data-time="1722873700" data-date-string="Aug 5, 2024" data-time-string="11:01 AM" title="Aug 5, 2024 at 11:01 AM">Aug 5, 2024</time></li> <li> <dl class="tagList tagList--thread-1064881 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/electron/" data-xf-init="preview-tooltip" data-preview-url="/tags/electron/preview" class="tagItem tagItem--tag_electron" dir="auto"> Electron </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/moment/" data-xf-init="preview-tooltip" data-preview-url="/tags/moment/preview" class="tagItem tagItem--tag_moment" dir="auto"> Moment </a> </span> </dd> </dl> </li> <li>Replies: 6</li> <li>Forum: <a href="/forums/quantum-physics.62/">Quantum Physics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="BuggyWungos"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/buggywungos.751034/" class="avatar avatar--s" data-user-id="751034" data-xf-init="member-tooltip"> <img src="/data/avatars/s/751/751034.jpg?1721457077" srcset="/data/avatars/m/751/751034.jpg?1721457077 2x" alt="BuggyWungos" class="avatar-u751034-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/magnetic-field-of-an-infinite-current-carrying-wire-at-a-point.1064805/">Magnetic Field of an infinite current-carrying wire at a point</a> </h3> <div class="contentRow-snippet">My attempt: $$d\vec{B}(r) = \dfrac{\mu_0}{4\pi}\dfrac{Id\vec{l}r\sin{\theta}}{r^2}$$ $$d\vec{B}(r) = \dfrac{\mu_0}{4\pi}\dfrac{Id\vec{l}\sin{\theta}}{r}$$ $$ \sin{\theta} = \dfrac{y}{(x^2+y^2)^{1/2}}$$ $$ d\vec{B}(r) = \dfrac{\mu_0}{4\pi}\dfrac{Id\vec{l}}{r}\dfrac{y}{(x^2+y^2)^{1/2}}$$...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/buggywungos.751034/" class="username " dir="auto" data-user-id="751034" data-xf-init="member-tooltip">BuggyWungos</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-08-02T17:44:50-0500" data-time="1722638690" data-date-string="Aug 2, 2024" data-time-string="5:44 PM" title="Aug 2, 2024 at 5:44 PM">Aug 2, 2024</time></li> <li> <dl class="tagList tagList--thread-1064805 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/current/" data-xf-init="preview-tooltip" data-preview-url="/tags/current/preview" class="tagItem tagItem--tag_current" dir="auto"> Current </a> <a href="/tags/infinite/" data-xf-init="preview-tooltip" data-preview-url="/tags/infinite/preview" class="tagItem tagItem--tag_infinite" dir="auto"> Infinite </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 5</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="phys9928"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/phys9928.751155/" class="avatar avatar--s" data-user-id="751155" data-xf-init="member-tooltip"> <img src="/data/avatars/s/751/751155.jpg?1721922729" srcset="/data/avatars/m/751/751155.jpg?1721922729 2x" alt="phys9928" class="avatar-u751155-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/magnetic-field-in-and-around-a-conductive-hollow-cylinder.1064584/">Magnetic field in and around a conductive hollow cylinder</a> </h3> <div class="contentRow-snippet">My attempt at a solution: Cylindrical coordinate system with ##r##, ##\theta##, ##z##. Conductivity ##\sigma## and permeability ##\mu_0##. Inner radius ##a## and outer radius ##b##. (##b>a##) The external field is spatially uniform and driven at sinusoidally at frequency ##f##. The external...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/phys9928.751155/" class="username " dir="auto" data-user-id="751155" data-xf-init="member-tooltip">phys9928</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-07-25T10:57:11-0500" data-time="1721923031" data-date-string="Jul 25, 2024" data-time-string="10:57 AM" title="Jul 25, 2024 at 10:57 AM">Jul 25, 2024</time></li> <li> <dl class="tagList tagList--thread-1064584 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 2</li> <li>Forum: <a href="/forums/advanced-physics-homework-help.154/">Advanced Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="Hornbein"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/hornbein.489043/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="489043" data-xf-init="member-tooltip" style="background-color: #8585e0; color: #24248f"> <span class="avatar-u489043-s" role="img" aria-label="Hornbein">H</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/magnetic-vorticies-in-superconductors-dont-confine-electrons.1064539/"><span class="prefix advanced" dir="auto">A</span><span class="label-append"> </span>Magnetic Vorticies In Superconductors Don't Confine Electrons</a> </h3> <div class="contentRow-snippet">https://physics.aps.org/articles/v17/117 Small one-quantum magnetic vorticies form in Type 1.5 and 2 superconductors. It was thought that such vorticies would confine the non-superconducting electrons inside them. This experiment shows that this is not the case. The vortex can move for the...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/hornbein.489043/" class="username " dir="auto" data-user-id="489043" data-xf-init="member-tooltip">Hornbein</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-07-23T11:08:47-0500" data-time="1721750927" data-date-string="Jul 23, 2024" data-time-string="11:08 AM" title="Jul 23, 2024 at 11:08 AM">Jul 23, 2024</time></li> <li> <dl class="tagList tagList--thread-1064539 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/superconductor/" data-xf-init="preview-tooltip" data-preview-url="/tags/superconductor/preview" class="tagItem tagItem--tag_superconductor" dir="auto"> Superconductor </a> <a href="/tags/vortex/" data-xf-init="preview-tooltip" data-preview-url="/tags/vortex/preview" class="tagItem tagItem--tag_vortex" dir="auto"> Vortex </a> </span> </dd> </dl> </li> <li>Replies: 0</li> <li>Forum: <a href="/forums/quantum-physics.62/">Quantum Physics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="ohwilleke"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/ohwilleke.19562/" class="avatar avatar--s" data-user-id="19562" data-xf-init="member-tooltip"> <img src="/data/avatars/s/19/19562.jpg?1431188772" srcset="/data/avatars/m/19/19562.jpg?1431188772 2x" alt="ohwilleke" class="avatar-u19562-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/new-muon-g-2-calculation-consistent-with-experiment.1064375/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>New muon g-2 calculation consistent with experiment</a> </h3> <div class="contentRow-snippet">The updated BMW calculation of the hadronic vacuum polarization contribution to the muon anomalous magnetic moment aμ in the Standard Model is squarely consistent, at 0.9 sigma with the experimental measurement of muon g-2. This agreement is found to be present despite the fact that its...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/ohwilleke.19562/" class="username " dir="auto" data-user-id="19562" data-xf-init="member-tooltip">ohwilleke</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-07-16T15:37:51-0500" data-time="1721162271" data-date-string="Jul 16, 2024" data-time-string="3:37 PM" title="Jul 16, 2024 at 3:37 PM">Jul 16, 2024</time></li> <li> <dl class="tagList tagList--thread-1064375 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/muon/" data-xf-init="preview-tooltip" data-preview-url="/tags/muon/preview" class="tagItem tagItem--tag_muon" dir="auto"> Muon </a> </span> </dd> </dl> </li> <li>Replies: 0</li> <li>Forum: <a href="/forums/high-energy-nuclear-particle-physics.65/">High Energy, Nuclear, Particle Physics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="FusionJim"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/fusionjim.748120/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="748120" data-xf-init="member-tooltip" style="background-color: #755757; color: #c9b6b6"> <span class="avatar-u748120-s" role="img" aria-label="FusionJim">F</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/can-coax-wound-coils-prevent-radiation-in-ferrite-core-magnetic-circuits.1064258/">Can Coax-Wound Coils Prevent Radiation in Ferrite Core Magnetic Circuits?</a> </h3> <div class="contentRow-snippet">Assume i want to create a magnetic circuit within a ferrite core with airgap (i need the B field in airgap). The ferite core would have a coil on it. Problem is if i want my core airgap area and magnetic path length longer than wavelenght of current through the coil i would have high losses as...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/fusionjim.748120/" class="username " dir="auto" data-user-id="748120" data-xf-init="member-tooltip">FusionJim</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-07-11T04:35:18-0500" data-time="1720690518" data-date-string="Jul 11, 2024" data-time-string="4:35 AM" title="Jul 11, 2024 at 4:35 AM">Jul 11, 2024</time></li> <li> <dl class="tagList tagList--thread-1064258 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/circuit/" data-xf-init="preview-tooltip" data-preview-url="/tags/circuit/preview" class="tagItem tagItem--tag_circuit" dir="auto"> Circuit </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 22</li> <li>Forum: <a href="/forums/electrical-engineering.102/">Electrical Engineering</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="DenniSys"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/dennisys.670002/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="670002" data-xf-init="member-tooltip" style="background-color: #85e0a3; color: #248f47"> <span class="avatar-u670002-s" role="img" aria-label="DenniSys">D</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/why-cant-we-photograph-magnetic-lines-of-force-emitted-by-planetary-and-beyond-objects-like-we-can-for-the-sun.1064123/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>Why can't we photograph magnetic lines of force emitted by planetary and beyond objects (like we can for the Sun)?</a> </h3> <div class="contentRow-snippet">First astrophotography was black and white. So then we colored it in. Then the light got filtered so people can see the universe better. When I ask why are there no photographs of magnetic field lines in space, or anywhere; I read that it's because our eyes cannot see them, but we can't see...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/dennisys.670002/" class="username " dir="auto" data-user-id="670002" data-xf-init="member-tooltip">DenniSys</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-07-04T21:04:07-0500" data-time="1720145047" data-date-string="Jul 4, 2024" data-time-string="9:04 PM" title="Jul 4, 2024 at 9:04 PM">Jul 4, 2024</time></li> <li> <dl class="tagList tagList--thread-1064123 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/astrophotography/" data-xf-init="preview-tooltip" data-preview-url="/tags/astrophotography/preview" class="tagItem tagItem--tag_astrophotography" dir="auto"> Astrophotography </a> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 15</li> <li>Forum: <a href="/forums/other-physics-topics.111/">Other Physics Topics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="Physicist-Writer"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/physicist-writer.750203/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="750203" data-xf-init="member-tooltip" style="background-color: #adcceb; color: #2e73b8"> <span class="avatar-u750203-s" role="img" aria-label="Physicist-Writer">P</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/is-this-analogy-between-magnetic-force-and-gravitational-force-accurate-in-helping-to-understand-what-contributes-more-to-a-stronger-magnetic-force.1063788/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>Is this analogy between Magnetic Force and Gravitational Force accurate in helping to understand what contributes more to a stronger magnetic force?</a> </h3> <div class="contentRow-snippet">So, the formula for Gravitational force is F= Gm1m2/r^2 So a given mass such as the earth and a mass such as much self both contribute to an equal and opposite gravitational force on each other. But we can also think of it separately in terms of just the gravitional field generated. The Earth...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/physicist-writer.750203/" class="username " dir="auto" data-user-id="750203" data-xf-init="member-tooltip">Physicist-Writer</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-06-21T11:24:54-0500" data-time="1718987094" data-date-string="Jun 21, 2024" data-time-string="11:24 AM" title="Jun 21, 2024 at 11:24 AM">Jun 21, 2024</time></li> <li> <dl class="tagList tagList--thread-1063788 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/analogy/" data-xf-init="preview-tooltip" data-preview-url="/tags/analogy/preview" class="tagItem tagItem--tag_analogy" dir="auto"> Analogy </a> <a href="/tags/gravitational/" data-xf-init="preview-tooltip" data-preview-url="/tags/gravitational/preview" class="tagItem tagItem--tag_gravitational" dir="auto"> Gravitational </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 11</li> <li>Forum: <a href="/forums/classical-physics.61/">Classical Physics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="DaveC426913"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/davec426913.15808/" class="avatar avatar--s" data-user-id="15808" data-xf-init="member-tooltip"> <img src="/data/avatars/s/15/15808.jpg?1431188719" alt="DaveC426913" class="avatar-u15808-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/is-the-suns-magnetic-field-about-to-flip.1063640/"><span class="prefix basic" dir="auto">B</span><span class="label-append"> </span>Is the Sun's Magnetic Field About to Flip?</a> </h3> <div class="contentRow-snippet">https://www.space.com/sun-magnetic-field-flip-solar-maximum-2024 I know theyre not the same physics. I just wondered if the the Suns 11 year polarity flip has any analogy to the flipping T-wrench effect.</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/davec426913.15808/" class="username " dir="auto" data-user-id="15808" data-xf-init="member-tooltip">DaveC426913</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-06-15T17:27:58-0500" data-time="1718490478" data-date-string="Jun 15, 2024" data-time-string="5:27 PM" title="Jun 15, 2024 at 5:27 PM">Jun 15, 2024</time></li> <li> <dl class="tagList tagList--thread-1063640 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/solar/" data-xf-init="preview-tooltip" data-preview-url="/tags/solar/preview" class="tagItem tagItem--tag_solar" dir="auto"> Solar </a> </span> </dd> </dl> </li> <li>Replies: 1</li> <li>Forum: <a href="/forums/classical-physics.61/">Classical Physics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="Bling Fizikst"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/bling-fizikst.746887/" class="avatar avatar--s" data-user-id="746887" data-xf-init="member-tooltip"> <img src="/data/avatars/s/746/746887.jpg?1711219121" srcset="/data/avatars/m/746/746887.jpg?1711219121 2x" alt="Bling Fizikst" class="avatar-u746887-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/magnetic-field-outside-a-semi-infinite-solenoid.1063422/">Magnetic field outside a semi-infinite solenoid</a> </h3> <div class="contentRow-snippet">The solenoid can be assumed to be a stack of rings of width ##dz## each where ##z:0\to-\infty## . $$i=nIdz$$ $$\sin\theta=\frac{R-r}{l}$$ $$\cos\theta=\frac{z+x}{l}$$ $$dB=\frac{\mu_{\circ}nIR d\varphi dz}{4\pi l^2}$$ Call ##\frac{\mu_{\circ}nIR}{4\pi}=\alpha## $$ B_y =\int dB\cos\theta ...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/bling-fizikst.746887/" class="username " dir="auto" data-user-id="746887" data-xf-init="member-tooltip">Bling Fizikst</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-06-08T07:58:33-0500" data-time="1717851513" data-date-string="Jun 8, 2024" data-time-string="7:58 AM" title="Jun 8, 2024 at 7:58 AM">Jun 8, 2024</time></li> <li> <dl class="tagList tagList--thread-1063422 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/solenoid/" data-xf-init="preview-tooltip" data-preview-url="/tags/solenoid/preview" class="tagItem tagItem--tag_solenoid" dir="auto"> Solenoid </a> </span> </dd> </dl> </li> <li>Replies: 12</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="FusionJim"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/fusionjim.748120/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="748120" data-xf-init="member-tooltip" style="background-color: #755757; color: #c9b6b6"> <span class="avatar-u748120-s" role="img" aria-label="FusionJim">F</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/could-flattened-end-magnets-improve-magnetic-mirror-traps.1063225/">Could Flattened End Magnets Improve Magnetic Mirror Traps?</a> </h3> <div class="contentRow-snippet">Hello, Knowing that the loss cone for a symmetrical geometry is also symmetrical, I was thinking has anyone ever tried a magnetic mirror where the central magnets are circular but the end magnets that create the highest B field are instead flattened. Wouldn't a flat coil achieve a stronger B...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/fusionjim.748120/" class="username " dir="auto" data-user-id="748120" data-xf-init="member-tooltip">FusionJim</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-06-01T04:01:50-0500" data-time="1717232510" data-date-string="Jun 1, 2024" data-time-string="4:01 AM" title="Jun 1, 2024 at 4:01 AM">Jun 1, 2024</time></li> <li> <dl class="tagList tagList--thread-1063225 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/coil/" data-xf-init="preview-tooltip" data-preview-url="/tags/coil/preview" class="tagItem tagItem--tag_coil" dir="auto"> Coil </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/mirror/" data-xf-init="preview-tooltip" data-preview-url="/tags/mirror/preview" class="tagItem tagItem--tag_mirror" dir="auto"> Mirror </a> </span> </dd> </dl> </li> <li>Replies: 9</li> <li>Forum: <a href="/forums/nuclear-engineering.106/">Nuclear Engineering</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="mymodded"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/mymodded.748443/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="748443" data-xf-init="member-tooltip" style="background-color: #336633; color: #88c388"> <span class="avatar-u748443-s" role="img" aria-label="mymodded">M</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/an-x-from-nowhere-mistake-by-textbook-induced-voltages.1063148/">An "x" from nowhere, mistake by textbook? (induced voltages)</a> </h3> <div class="contentRow-snippet">this is the figure in the question.The question can be solved by first finding the induced voltage (and then the induced current), and then we can find the force on each side of the wire due to the magnetic field and subtract them from each other (since the force on the upper and lower sides are...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/mymodded.748443/" class="username " dir="auto" data-user-id="748443" data-xf-init="member-tooltip">mymodded</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-05-29T07:49:46-0500" data-time="1716986986" data-date-string="May 29, 2024" data-time-string="7:49 AM" title="May 29, 2024 at 7:49 AM">May 29, 2024</time></li> <li> <dl class="tagList tagList--thread-1063148 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/induced/" data-xf-init="preview-tooltip" data-preview-url="/tags/induced/preview" class="tagItem tagItem--tag_induced" dir="auto"> Induced </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/voltage/" data-xf-init="preview-tooltip" data-preview-url="/tags/voltage/preview" class="tagItem tagItem--tag_voltage" dir="auto"> Voltage </a> </span> </dd> </dl> </li> <li>Replies: 2</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="hongseok"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/hongseok.742045/" class="avatar avatar--s" data-user-id="742045" data-xf-init="member-tooltip"> <img src="/data/avatars/s/742/742045.jpg?1698923636" srcset="/data/avatars/m/742/742045.jpg?1698923636 2x" alt="hongseok" class="avatar-u742045-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/how-is-a-magnetic-field-formed-in-a-space-surrounded-by-one-pole.1062725/"><span class="prefix basic" dir="auto">B</span><span class="label-append"> </span>How is a magnetic field formed in a space surrounded by one pole?</a> </h3> <div class="contentRow-snippet">There is a magnet in the shape of a hollow sphere. And the inner surfaces are all n-poles, and the outer surfaces are all s-poles. At this time, how is the magnetic field formed in the empty space of the sphere? There is no s pole for the magnetic force lines from the n pole to enter, so can...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/hongseok.742045/" class="username " dir="auto" data-user-id="742045" data-xf-init="member-tooltip">hongseok</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-05-15T04:03:10-0500" data-time="1715763790" data-date-string="May 15, 2024" data-time-string="4:03 AM" title="May 15, 2024 at 4:03 AM">May 15, 2024</time></li> <li> <dl class="tagList tagList--thread-1062725 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 3</li> <li>Forum: <a href="/forums/other-physics-topics.111/">Other Physics Topics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="greypilgrim"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/greypilgrim.490763/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="490763" data-xf-init="member-tooltip" style="background-color: #c2c2f0; color: #3333cc"> <span class="avatar-u490763-s" role="img" aria-label="greypilgrim">G</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/does-displacement-current-create-a-magnetic-field-and-lorentz-force.1062418/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>Does displacement current create a magnetic field? And Lorentz force?</a> </h3> <div class="contentRow-snippet">Hi. Does displacement current create a magnetic field by Biot-Savart? I googled and found contradictory answers. Also, in the presence of an external magnetic field, is it meaningful to calculate a Lorentz force acting on displacement current? What does the force actually act on then?</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/greypilgrim.490763/" class="username " dir="auto" data-user-id="490763" data-xf-init="member-tooltip">greypilgrim</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-05-04T20:17:22-0500" data-time="1714871842" data-date-string="May 4, 2024" data-time-string="8:17 PM" title="May 4, 2024 at 8:17 PM">May 4, 2024</time></li> <li> <dl class="tagList tagList--thread-1062418 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/current/" data-xf-init="preview-tooltip" data-preview-url="/tags/current/preview" class="tagItem tagItem--tag_current" dir="auto"> Current </a> <a href="/tags/displacement/" data-xf-init="preview-tooltip" data-preview-url="/tags/displacement/preview" class="tagItem tagItem--tag_displacement" dir="auto"> Displacement </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 10</li> <li>Forum: <a href="/forums/electromagnetism.302/">Electromagnetism</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="Mikael17"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/mikael17.698972/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="698972" data-xf-init="member-tooltip" style="background-color: #66cc33; color: #1f3d0f"> <span class="avatar-u698972-s" role="img" aria-label="Mikael17">M</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/solar-wind-particles-reaching-into-earths-magnetic-field.1062300/"><span class="prefix basic" dir="auto">B</span><span class="label-append"> </span>Solar Wind Particles, - reaching into Earth's magnetic field?</a> </h3> <div class="contentRow-snippet">How many particles (approximately) from the solar wind reach deep into the Earth's magnetic field every second. Possibly measured in mass?</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/mikael17.698972/" class="username " dir="auto" data-user-id="698972" data-xf-init="member-tooltip">Mikael17</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-05-01T06:23:36-0500" data-time="1714562616" data-date-string="May 1, 2024" data-time-string="6:23 AM" title="May 1, 2024 at 6:23 AM">May 1, 2024</time></li> <li> <dl class="tagList tagList--thread-1062300 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/solar/" data-xf-init="preview-tooltip" data-preview-url="/tags/solar/preview" class="tagItem tagItem--tag_solar" dir="auto"> Solar </a> <a href="/tags/wind/" data-xf-init="preview-tooltip" data-preview-url="/tags/wind/preview" class="tagItem tagItem--tag_wind" dir="auto"> Wind </a> </span> </dd> </dl> </li> <li>Replies: 1</li> <li>Forum: <a href="/forums/astronomy-and-astrophysics.71/">Astronomy and Astrophysics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="Kartofen69420"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/kartofen69420.748127/" class="avatar avatar--s" data-user-id="748127" data-xf-init="member-tooltip"> <img src="/data/avatars/s/748/748127.jpg?1713547882" srcset="/data/avatars/m/748/748127.jpg?1713547882 2x" alt="Kartofen69420" class="avatar-u748127-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/calculating-magnetic-field-at-point-p-for-perpendicular-current-carrying-wires.1061968/">Calculating Magnetic Field at Point P for Perpendicular Current-Carrying Wires</a> </h3> <div class="contentRow-snippet">A wire coinciding with the X-axis carries a current I1 in the direction of increasing x. A second wire is parallel to the Z-axis at a distance R, and carries a current I2 in the downward direction as indicated in the figure. The magnetic field at point P (0, 0, R) is: (options and diagram in photo)</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/kartofen69420.748127/" class="username " dir="auto" data-user-id="748127" data-xf-init="member-tooltip">Kartofen69420</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-04-19T12:40:33-0500" data-time="1713548433" data-date-string="Apr 19, 2024" data-time-string="12:40 PM" title="Apr 19, 2024 at 12:40 PM">Apr 19, 2024</time></li> <li> <dl class="tagList tagList--thread-1061968 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/current/" data-xf-init="preview-tooltip" data-preview-url="/tags/current/preview" class="tagItem tagItem--tag_current" dir="auto"> Current </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/wire/" data-xf-init="preview-tooltip" data-preview-url="/tags/wire/preview" class="tagItem tagItem--tag_wire" dir="auto"> Wire </a> </span> </dd> </dl> </li> <li>Replies: 2</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="Graham87"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/graham87.702025/" class="avatar avatar--s" data-user-id="702025" data-xf-init="member-tooltip"> <img src="/data/avatars/s/702/702025.jpg?1654698159" srcset="/data/avatars/m/702/702025.jpg?1654698159 2x" alt="Graham87" class="avatar-u702025-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/magnetic-dipole-moment-and-integration-surfaces-introductory-electromagnetics-magnetistatics.1061612/">Magnetic dipole moment and integration surfaces (Introductory Electromagnetics - Magnetistatics)</a> </h3> <div class="contentRow-snippet">A current current loop is running through this figure. How do I design integration surfaces to find the magnetic dipole moment? In the solution the three following figures were designed for integration surface, and they prove that they all give the same answer of ## m= 2IRd \hat{z} ##. For...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/graham87.702025/" class="username " dir="auto" data-user-id="702025" data-xf-init="member-tooltip">Graham87</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-04-08T05:38:11-0500" data-time="1712572691" data-date-string="Apr 8, 2024" data-time-string="5:38 AM" title="Apr 8, 2024 at 5:38 AM">Apr 8, 2024</time></li> <li> <dl class="tagList tagList--thread-1061612 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/dipole/" data-xf-init="preview-tooltip" data-preview-url="/tags/dipole/preview" class="tagItem tagItem--tag_dipole" dir="auto"> Dipole </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/moment/" data-xf-init="preview-tooltip" data-preview-url="/tags/moment/preview" class="tagItem tagItem--tag_moment" dir="auto"> Moment </a> </span> </dd> </dl> </li> <li>Replies: 4</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="jsnprt"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/jsnprt.747590/" class="avatar avatar--s" data-user-id="747590" data-xf-init="member-tooltip"> <img src="/data/avatars/s/747/747590.jpg?1712391146" srcset="/data/avatars/m/747/747590.jpg?1712391146 2x" alt="jsnprt" class="avatar-u747590-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/biot-savart-law-gives-us-magnetic-field-strength-or-magnetic-flux-density.1061553/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>Biot Savart law gives us magnetic field strength or magnetic flux density?</a> </h3> <div class="contentRow-snippet">What is the difference between magnetic field strength, magnetic field intansity and magnetic flux density. I have heard that MG intansity is independent of medium it represents the magnetizing power of a magnetic force</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/jsnprt.747590/" class="username " dir="auto" data-user-id="747590" data-xf-init="member-tooltip">jsnprt</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-04-06T03:12:35-0500" data-time="1712391155" data-date-string="Apr 6, 2024" data-time-string="3:12 AM" title="Apr 6, 2024 at 3:12 AM">Apr 6, 2024</time></li> <li> <dl class="tagList tagList--thread-1061553 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 1</li> <li>Forum: <a href="/forums/other-physics-topics.111/">Other Physics Topics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="maxelcat"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/maxelcat.622943/" class="avatar avatar--s" data-user-id="622943" data-xf-init="member-tooltip"> <img src="/data/avatars/s/622/622943.jpg?1494276753" srcset="/data/avatars/m/622/622943.jpg?1494276753 2x" alt="maxelcat" class="avatar-u622943-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/which-way-does-this-coil-turn-in-a-magnetic-field.1061172/">Which way does this coil turn in a magnetic field?</a> </h3> <div class="contentRow-snippet">I use FLHR and the plan diagram. This suggests that the left hand side of the coil is going down. I have added annotations to this, which agree with the mark scheme which then goes onto suggest that the coil turns clockwise. To me though this would make it go anti clockwise. So... what am I...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/maxelcat.622943/" class="username " dir="auto" data-user-id="622943" data-xf-init="member-tooltip">maxelcat</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-03-24T05:18:47-0500" data-time="1711275527" data-date-string="Mar 24, 2024" data-time-string="5:18 AM" title="Mar 24, 2024 at 5:18 AM">Mar 24, 2024</time></li> <li> <dl class="tagList tagList--thread-1061172 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/coil/" data-xf-init="preview-tooltip" data-preview-url="/tags/coil/preview" class="tagItem tagItem--tag_coil" dir="auto"> Coil </a> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 2</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="GaloisGroup"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/galoisgroup.746813/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="746813" data-xf-init="member-tooltip" style="background-color: #993333; color: #df9f9f"> <span class="avatar-u746813-s" role="img" aria-label="GaloisGroup">G</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/why-do-some-theorists-claim-cosmic-inflation-dilutes-magnetic-monopoles.1060988/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>Why Do Some Theorists Claim Cosmic Inflation Dilutes Magnetic Monopoles?</a> </h3> <div class="contentRow-snippet">So if Maxwell's Equations state that Div B = 0 which is a statement that there are no magnetic monopoles why do some folks claim that Cosmic Inflation "dilutes" magnetic monopoles?</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/galoisgroup.746813/" class="username " dir="auto" data-user-id="746813" data-xf-init="member-tooltip">GaloisGroup</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-03-17T14:49:00-0500" data-time="1710704940" data-date-string="Mar 17, 2024" data-time-string="2:49 PM" title="Mar 17, 2024 at 2:49 PM">Mar 17, 2024</time></li> <li> <dl class="tagList tagList--thread-1060988 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/equations/" data-xf-init="preview-tooltip" data-preview-url="/tags/equations/preview" class="tagItem tagItem--tag_equations" dir="auto"> equations </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/maxwell/" data-xf-init="preview-tooltip" data-preview-url="/tags/maxwell/preview" class="tagItem tagItem--tag_maxwell" dir="auto"> Maxwell </a> </span> </dd> </dl> </li> <li>Replies: 5</li> <li>Forum: <a href="/forums/electromagnetism.302/">Electromagnetism</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="flatmosquito"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/flatmosquito.746671/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="746671" data-xf-init="member-tooltip" style="background-color: #996666; color: #e0d1d1"> <span class="avatar-u746671-s" role="img" aria-label="flatmosquito">F</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/monitors-magnetic-field-setting-off-handheld-co-detector.1060866/">Monitor's magnetic field setting off handheld CO detector</a> </h3> <div class="contentRow-snippet">Hi, I have a small handheld CO detector (https://www.amazon.com/gp/product/B08SQPKTGN/?tag=pfamazon01-20), and I've noticed that leaving it on my desk near my monitor will invariably trigger the alarm. There are magnets that are housed at the base of the monitor (an old mac Thunderbolt display)...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/flatmosquito.746671/" class="username " dir="auto" data-user-id="746671" data-xf-init="member-tooltip">flatmosquito</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-03-13T12:34:19-0500" data-time="1710351259" data-date-string="Mar 13, 2024" data-time-string="12:34 PM" title="Mar 13, 2024 at 12:34 PM">Mar 13, 2024</time></li> <li> <dl class="tagList tagList--thread-1060866 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/monitor/" data-xf-init="preview-tooltip" data-preview-url="/tags/monitor/preview" class="tagItem tagItem--tag_monitor" dir="auto"> Monitor </a> </span> </dd> </dl> </li> <li>Replies: 6</li> <li>Forum: <a href="/forums/electrical-engineering.102/">Electrical Engineering</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="Aurelius120"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/aurelius120.691593/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="691593" data-xf-init="member-tooltip" style="background-color: #33cc66; color: #0f3d1f"> <span class="avatar-u691593-s" role="img" aria-label="Aurelius120">A</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/magnetic-field-due-to-wire-of-semi-circular-cross-section.1060506/">Magnetic Field Due To Wire Of Semi-Circular Cross Section</a> </h3> <div class="contentRow-snippet">I proceeded as follows Current in sector ##d\theta=## is: $$dI=\int_{x=0}^{x=R}{\frac{I}{\pi R^2/2}\times\frac{d\theta}{2\pi}\times 2\pi x dx}$$ Field due to sector ##d\theta## is therefore $$dB=\int^{x=R}_{x=0}{\frac{\mu_○}{2\pi x}\times\frac{I}{\pi R^2/2}\times\frac{d\theta}{2\pi}\times 2\pi x...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/aurelius120.691593/" class="username " dir="auto" data-user-id="691593" data-xf-init="member-tooltip">Aurelius120</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-03-02T09:25:45-0600" data-time="1709393145" data-date-string="Mar 2, 2024" data-time-string="9:25 AM" title="Mar 2, 2024 at 9:25 AM">Mar 2, 2024</time></li> <li> <dl class="tagList tagList--thread-1060506 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/wire/" data-xf-init="preview-tooltip" data-preview-url="/tags/wire/preview" class="tagItem tagItem--tag_wire" dir="auto"> Wire </a> </span> </dd> </dl> </li> <li>Replies: 5</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="katarameno"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/katarameno.746215/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="746215" data-xf-init="member-tooltip" style="background-color: #33cc66; color: #0f3d1f"> <span class="avatar-u746215-s" role="img" aria-label="katarameno">K</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/calculation-of-the-magnetic-field-of-four-quarter-circles.1060502/">Calculation of the magnetic field of four quarter circles</a> </h3> <div class="contentRow-snippet">The diagram is something like this, and I want to calculate the magnetic field at the center using the Biot-Savart law. In this case, do the magnetic fields formed by the quarter circles pairwise alternate with each other?</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/katarameno.746215/" class="username " dir="auto" data-user-id="746215" data-xf-init="member-tooltip">katarameno</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-03-02T05:25:41-0600" data-time="1709378741" data-date-string="Mar 2, 2024" data-time-string="5:25 AM" title="Mar 2, 2024 at 5:25 AM">Mar 2, 2024</time></li> <li> <dl class="tagList tagList--thread-1060502 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 12</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="tanmays1"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/tanmays1.745926/" class="avatar avatar--s" data-user-id="745926" data-xf-init="member-tooltip"> <img src="/data/avatars/s/745/745926.jpg?1708764513" srcset="/data/avatars/m/745/745926.jpg?1708764513 2x" alt="tanmays1" class="avatar-u745926-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/does-levitation-distance-increase-as-fg-increase.1060285/">Does levitation distance increase as Fg increase???</a> </h3> <div class="contentRow-snippet">I'm trying to conduct an experiment where I calculate the magnetic field strength of a magnet, by comparing the levitation distances between two magnets. My experiment involves using different masses to anchor down magnetic repulsion between 2 magnets. Fg = Fm. The formula I am using for this...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/tanmays1.745926/" class="username " dir="auto" data-user-id="745926" data-xf-init="member-tooltip">tanmays1</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-02-24T02:50:12-0600" data-time="1708764612" data-date-string="Feb 24, 2024" data-time-string="2:50 AM" title="Feb 24, 2024 at 2:50 AM">Feb 24, 2024</time></li> <li> <dl class="tagList tagList--thread-1060285 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/levitation/" data-xf-init="preview-tooltip" data-preview-url="/tags/levitation/preview" class="tagItem tagItem--tag_levitation" dir="auto"> Levitation </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 1</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="fmorgan2"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/fmorgan2.744627/" class="avatar avatar--s" data-user-id="744627" data-xf-init="member-tooltip"> <img src="/data/avatars/s/744/744627.jpg?1705770739" srcset="/data/avatars/m/744/744627.jpg?1705770739 2x" alt="fmorgan2" class="avatar-u744627-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/changing-magnetic-polarity-of-an-electromagnet.1059255/"><span class="prefix basic" dir="auto">B</span><span class="label-append"> </span>Changing magnetic polarity of an electromagnet</a> </h3> <div class="contentRow-snippet">I would like to change the polarity of an electromagnet. I have reversed the wires attached to a 9 volt battery that wound about a bar magnet but this did not seem to make the north pole become the south pole. Thanks for your assistance, Frank</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/fmorgan2.744627/" class="username " dir="auto" data-user-id="744627" data-xf-init="member-tooltip">fmorgan2</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-01-20T11:12:22-0600" data-time="1705770742" data-date-string="Jan 20, 2024" data-time-string="11:12 AM" title="Jan 20, 2024 at 11:12 AM">Jan 20, 2024</time></li> <li> <dl class="tagList tagList--thread-1059255 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/electromagnet/" data-xf-init="preview-tooltip" data-preview-url="/tags/electromagnet/preview" class="tagItem tagItem--tag_electromagnet" dir="auto"> Electromagnet </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/polarity/" data-xf-init="preview-tooltip" data-preview-url="/tags/polarity/preview" class="tagItem tagItem--tag_polarity" dir="auto"> Polarity </a> </span> </dd> </dl> </li> <li>Replies: 10</li> <li>Forum: <a href="/forums/electromagnetism.302/">Electromagnetism</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="Swamp Thing"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/swamp-thing.5126/" class="avatar avatar--s" data-user-id="5126" data-xf-init="member-tooltip"> <img src="/data/avatars/s/5/5126.jpg?1738200575" srcset="/data/avatars/m/5/5126.jpg?1738200575 2x" alt="Swamp Thing" class="avatar-u5126-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/shielded-magnetic-loop-probe-antennas.1059102/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>Shielded magnetic loop probe / antennas</a> </h3> <div class="contentRow-snippet">From a purely physics point of view, what would be the performance tradeoffs between the following types of shielded H-field pickups or antennas? Sources: https://owenduffy.net/blog/?p=18180 https://emcesd.com/tt120100.htm (A)[/size] (B)[/size]...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/swamp-thing.5126/" class="username " dir="auto" data-user-id="5126" data-xf-init="member-tooltip">Swamp Thing</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-01-15T20:03:57-0600" data-time="1705370637" data-date-string="Jan 15, 2024" data-time-string="8:03 PM" title="Jan 15, 2024 at 8:03 PM">Jan 15, 2024</time></li> <li> <dl class="tagList tagList--thread-1059102 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/loop/" data-xf-init="preview-tooltip" data-preview-url="/tags/loop/preview" class="tagItem tagItem--tag_loop" dir="auto"> Loop </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 8</li> <li>Forum: <a href="/forums/classical-physics.61/">Classical Physics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="Sedg101"> <div class="contentRow "> <span class="contentRow-figure"> <span class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="0" style="background-color: #cc33ad; color: #3d0f34" title="Sedg101"> <span class="avatar-u0-s" role="img" aria-label="Sedg101">S</span> </span> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/magnetic-and-ultra-sonic-interests.1058703/">Magnetic and Ultra-Sonic Interests</a> </h3> <div class="contentRow-snippet">I'm an entrepreneur with an interest in Magnetics and Ultra - Sonics. I have a strong belief that there are many more applications in which both could be utilised to minimise the use of various energy forms. I am here simply to learn and understand and ultimately to connect with members who...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><span class="username " dir="auto" data-user-id="0">Sedg101</span></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2024-01-02T00:03:19-0600" data-time="1704175399" data-date-string="Jan 2, 2024" data-time-string="12:03 AM" title="Jan 2, 2024 at 12:03 AM">Jan 2, 2024</time></li> <li> <dl class="tagList tagList--thread-1058703 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/ultrasonic/" data-xf-init="preview-tooltip" data-preview-url="/tags/ultrasonic/preview" class="tagItem tagItem--tag_ultrasonic" dir="auto"> Ultrasonic </a> </span> </dd> </dl> </li> <li>Replies: 1</li> <li>Forum: <a href="/forums/new-member-introductions.240/">New Member Introductions</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="Szecska8"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/szecska8.736999/" class="avatar avatar--s" data-user-id="736999" data-xf-init="member-tooltip"> <img src="/data/avatars/s/736/736999.jpg?1685721086" srcset="/data/avatars/m/736/736999.jpg?1685721086 2x" alt="Szecska8" class="avatar-u736999-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/stored-magnetic-energy-of-solenoid.1052906/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>Stored magnetic energy of solenoid</a> </h3> <div class="contentRow-snippet">Can someone explain to me what the second integral represents and what is A?</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/szecska8.736999/" class="username " dir="auto" data-user-id="736999" data-xf-init="member-tooltip">Szecska8</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2023-06-02T11:05:30-0500" data-time="1685721930" data-date-string="Jun 2, 2023" data-time-string="11:05 AM" title="Jun 2, 2023 at 11:05 AM">Jun 2, 2023</time></li> <li> <dl class="tagList tagList--thread-1052906 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/energy/" data-xf-init="preview-tooltip" data-preview-url="/tags/energy/preview" class="tagItem tagItem--tag_energy" dir="auto"> Energy </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/solenoid/" data-xf-init="preview-tooltip" data-preview-url="/tags/solenoid/preview" class="tagItem tagItem--tag_solenoid" dir="auto"> Solenoid </a> </span> </dd> </dl> </li> <li>Replies: 2</li> <li>Forum: <a href="/forums/electromagnetism.302/">Electromagnetism</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="harryharns"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/harryharns.736169/" class="avatar avatar--s" data-user-id="736169" data-xf-init="member-tooltip"> <img src="/data/avatars/s/736/736169.jpg?1683981870" srcset="/data/avatars/m/736/736169.jpg?1683981870 2x" alt="harryharns" class="avatar-u736169-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/perform-rk4-between-2-clusters-in-magnetic-field.1052407/"><span class="label label--silver" dir="auto">C/C++</span><span class="label-append"> </span>Perform RK4 between 2 Clusters in Magnetic Field</a> </h3> <div class="contentRow-snippet">I have a simulated data of charged particles in a magnetic field. I have selected clusters, each cluster contains a set of points(x,z) and I want to perform RK4 between the first and second clusters and fill the positions in a histogram. I have selected the clusters with the initial...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/harryharns.736169/" class="username " dir="auto" data-user-id="736169" data-xf-init="member-tooltip">harryharns</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2023-05-13T08:06:45-0500" data-time="1683983205" data-date-string="May 13, 2023" data-time-string="8:06 AM" title="May 13, 2023 at 8:06 AM">May 13, 2023</time></li> <li> <dl class="tagList tagList--thread-1052407 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/charged/" data-xf-init="preview-tooltip" data-preview-url="/tags/charged/preview" class="tagItem tagItem--tag_charged" dir="auto"> Charged </a> <a href="/tags/charged-particles/" data-xf-init="preview-tooltip" data-preview-url="/tags/charged-particles/preview" class="tagItem tagItem--tag_charged-particles" dir="auto"> Charged particles </a> <a href="/tags/clusters/" data-xf-init="preview-tooltip" data-preview-url="/tags/clusters/preview" class="tagItem tagItem--tag_clusters" dir="auto"> Clusters </a> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/magnetic-field/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic-field/preview" class="tagItem tagItem--tag_magnetic-field" dir="auto"> <em class="textHighlight">Magnetic</em> field </a> <a href="/tags/particles/" data-xf-init="preview-tooltip" data-preview-url="/tags/particles/preview" class="tagItem tagItem--tag_particles" dir="auto"> Particles </a> <a href="/tags/programming/" data-xf-init="preview-tooltip" data-preview-url="/tags/programming/preview" class="tagItem tagItem--tag_programming" dir="auto"> Programming </a> <a href="/tags/rk4/" data-xf-init="preview-tooltip" data-preview-url="/tags/rk4/preview" class="tagItem tagItem--tag_rk4" dir="auto"> Rk4 </a> </span> </dd> </dl> </li> <li>Replies: 12</li> <li>Forum: <a href="/forums/programming-and-computer-science.165/">Programming and Computer Science</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="ergospherical"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/ergospherical.691758/" class="avatar avatar--s" data-user-id="691758" data-xf-init="member-tooltip"> <img src="/data/avatars/s/691/691758.jpg?1638106583" srcset="/data/avatars/m/691/691758.jpg?1638106583 2x" alt="ergospherical" class="avatar-u691758-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/average-magnetic-moment-of-atom-in-magnetic-field-b.1052391/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>Average magnetic moment of atom in magnetic field ##B##</a> </h3> <div class="contentRow-snippet">from the partition function - am trying to show that ##\langle \mu \rangle = \beta^{-1} (\partial \log Z / \partial B)## where ##Z## is the canonical partition function for one atom, i.e. ##Z = \sum_{m=-j}^{j} \mathrm{exp}(\mu_0 \beta B m)##, and ##\mu = \mu_0 m##. The average...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/ergospherical.691758/" class="username " dir="auto" data-user-id="691758" data-xf-init="member-tooltip">ergospherical</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2023-05-12T14:35:12-0500" data-time="1683920112" data-date-string="May 12, 2023" data-time-string="2:35 PM" title="May 12, 2023 at 2:35 PM">May 12, 2023</time></li> <li> <dl class="tagList tagList--thread-1052391 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/atom/" data-xf-init="preview-tooltip" data-preview-url="/tags/atom/preview" class="tagItem tagItem--tag_atom" dir="auto"> Atom </a> <a href="/tags/average/" data-xf-init="preview-tooltip" data-preview-url="/tags/average/preview" class="tagItem tagItem--tag_average" dir="auto"> Average </a> <a href="/tags/average-energy/" data-xf-init="preview-tooltip" data-preview-url="/tags/average-energy/preview" class="tagItem tagItem--tag_average-energy" dir="auto"> average energy </a> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/magnetic-field/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic-field/preview" class="tagItem tagItem--tag_magnetic-field" dir="auto"> <em class="textHighlight">Magnetic</em> field </a> <a href="/tags/magnetic-moment/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic-moment/preview" class="tagItem tagItem--tag_magnetic-moment" dir="auto"> <em class="textHighlight">Magnetic</em> moment </a> <a href="/tags/moment/" data-xf-init="preview-tooltip" data-preview-url="/tags/moment/preview" class="tagItem tagItem--tag_moment" dir="auto"> Moment </a> <a href="/tags/partition-function/" data-xf-init="preview-tooltip" data-preview-url="/tags/partition-function/preview" class="tagItem tagItem--tag_partition-function" dir="auto"> Partition function </a> <a href="/tags/quantum-physics/" data-xf-init="preview-tooltip" data-preview-url="/tags/quantum-physics/preview" class="tagItem tagItem--tag_quantum-physics" dir="auto"> Quantum physics </a> </span> </dd> </dl> </li> <li>Replies: 1</li> <li>Forum: <a href="/forums/quantum-physics.62/">Quantum Physics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="dansmith170"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/dansmith170.694150/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="694150" data-xf-init="member-tooltip" style="background-color: #66cc99; color: #206040"> <span class="avatar-u694150-s" role="img" aria-label="dansmith170">D</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/magnetic-field-and-generator-power-output.1052340/"><span class="prefix basic" dir="auto">B</span><span class="label-append"> </span>Magnetic field and generator power output</a> </h3> <div class="contentRow-snippet">Hi, I am confused about whether decreasing the magnetic field used for a generator could increase the generator's power output. I used four equations: 1. Torque = Force x radius 2. Torque = NIAB (N = number of turns, I = current, A = area of armature, B = magnetic field). 3. emf =...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/dansmith170.694150/" class="username " dir="auto" data-user-id="694150" data-xf-init="member-tooltip">dansmith170</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2023-05-10T13:15:42-0500" data-time="1683742542" data-date-string="May 10, 2023" data-time-string="1:15 PM" title="May 10, 2023 at 1:15 PM">May 10, 2023</time></li> <li> <dl class="tagList tagList--thread-1052340 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/electromagnetism/" data-xf-init="preview-tooltip" data-preview-url="/tags/electromagnetism/preview" class="tagItem tagItem--tag_electromagnetism" dir="auto"> Electromagnetism </a> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/generator/" data-xf-init="preview-tooltip" data-preview-url="/tags/generator/preview" class="tagItem tagItem--tag_generator" dir="auto"> Generator </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/magnetic-field/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic-field/preview" class="tagItem tagItem--tag_magnetic-field" dir="auto"> <em class="textHighlight">Magnetic</em> field </a> <a href="/tags/output/" data-xf-init="preview-tooltip" data-preview-url="/tags/output/preview" class="tagItem tagItem--tag_output" dir="auto"> Output </a> <a href="/tags/power/" data-xf-init="preview-tooltip" data-preview-url="/tags/power/preview" class="tagItem tagItem--tag_power" dir="auto"> Power </a> <a href="/tags/power-output/" data-xf-init="preview-tooltip" data-preview-url="/tags/power-output/preview" class="tagItem tagItem--tag_power-output" dir="auto"> Power output </a> </span> </dd> </dl> </li> <li>Replies: 5</li> <li>Forum: <a href="/forums/electromagnetism.302/">Electromagnetism</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="rogdal"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/rogdal.730670/" class="avatar avatar--s" data-user-id="730670" data-xf-init="member-tooltip"> <img src="/data/avatars/s/730/730670.jpg?1683399896" srcset="/data/avatars/m/730/730670.jpg?1683399896 2x" alt="rogdal" class="avatar-u730670-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/classical-magnetic-dipole-dipole-interaction-in-iron.1052238/">Classical magnetic dipole-dipole interaction in iron</a> </h3> <div class="contentRow-snippet">I'm having a bit of trouble with this exercise because, even if I understand the physics of the dipole-dipole interaction in an ideal classical system, I don't get to know how to approach this problem. I've got a few doubts about how this system would work. First of all, what would be the...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/rogdal.730670/" class="username " dir="auto" data-user-id="730670" data-xf-init="member-tooltip">rogdal</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2023-05-06T14:30:18-0500" data-time="1683401418" data-date-string="May 6, 2023" data-time-string="2:30 PM" title="May 6, 2023 at 2:30 PM">May 6, 2023</time></li> <li> <dl class="tagList tagList--thread-1052238 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/classical/" data-xf-init="preview-tooltip" data-preview-url="/tags/classical/preview" class="tagItem tagItem--tag_classical" dir="auto"> Classical </a> <a href="/tags/ferromagnetism/" data-xf-init="preview-tooltip" data-preview-url="/tags/ferromagnetism/preview" class="tagItem tagItem--tag_ferromagnetism" dir="auto"> Ferromagnetism </a> <a href="/tags/interaction/" data-xf-init="preview-tooltip" data-preview-url="/tags/interaction/preview" class="tagItem tagItem--tag_interaction" dir="auto"> Interaction </a> <a href="/tags/iron/" data-xf-init="preview-tooltip" data-preview-url="/tags/iron/preview" class="tagItem tagItem--tag_iron" dir="auto"> Iron </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/magnetic-dipole-moment/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic-dipole-moment/preview" class="tagItem tagItem--tag_magnetic-dipole-moment" dir="auto"> <em class="textHighlight">Magnetic</em> dipole moment </a> <a href="/tags/solid-state-physics/" data-xf-init="preview-tooltip" data-preview-url="/tags/solid-state-physics/preview" class="tagItem tagItem--tag_solid-state-physics" dir="auto"> Solid state physics </a> </span> </dd> </dl> </li> <li>Replies: 7</li> <li>Forum: <a href="/forums/advanced-physics-homework-help.154/">Advanced Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="gary350"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/gary350.188064/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="188064" data-xf-init="member-tooltip" style="background-color: #33cc8f; color: #0f3d2b"> <span class="avatar-u188064-s" role="img" aria-label="gary350">G</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/should-i-use-true-north-or-magnetic-north-to-align-my-sundial.1052166/"><span class="prefix basic" dir="auto">B</span><span class="label-append"> </span>Should I use True North or Magnetic North to align my sundial?</a> </h3> <div class="contentRow-snippet">I'm not sure I asked the correct question. I am trying to learn when our sun is at solar 12 noon on my yard, does the sun light travel a perfect path across earth, 50% before solar 12 noon and 50% after solar 12 noon. I built a large sun dial in my yard 3 ft tall 6 ft long. I used a compass...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/gary350.188064/" class="username " dir="auto" data-user-id="188064" data-xf-init="member-tooltip">gary350</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2023-05-03T12:55:43-0500" data-time="1683136543" data-date-string="May 3, 2023" data-time-string="12:55 PM" title="May 3, 2023 at 12:55 PM">May 3, 2023</time></li> <li> <dl class="tagList tagList--thread-1052166 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> </span> </dd> </dl> </li> <li>Replies: 15</li> <li>Forum: <a href="/forums/classical-physics.61/">Classical Physics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="milkism"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/milkism.734134/" class="avatar avatar--s" data-user-id="734134" data-xf-init="member-tooltip"> <img src="/data/avatars/s/734/734134.jpg?1701519734" srcset="/data/avatars/m/734/734134.jpg?1701519734 2x" alt="milkism" class="avatar-u734134-s" width="48" height="48" loading="lazy" /> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/a-diamagnetic-sphere-in-a-uniform-magnetic-field.1052131/">A diamagnetic sphere in a uniform magnetic field</a> </h3> <div class="contentRow-snippet">Problem: Solution part a) where formula 6.14 is just M x n. We need to do part b without seperation of variables, I'm quite stuck. Will B just be the magnetic field inside a solenoid? How can I find the other fields.</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/milkism.734134/" class="username " dir="auto" data-user-id="734134" data-xf-init="member-tooltip">milkism</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2023-05-02T07:10:04-0500" data-time="1683029404" data-date-string="May 2, 2023" data-time-string="7:10 AM" title="May 2, 2023 at 7:10 AM">May 2, 2023</time></li> <li> <dl class="tagList tagList--thread-1052131 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/diamagnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/diamagnetic/preview" class="tagItem tagItem--tag_diamagnetic" dir="auto"> Diamagnetic </a> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/magnetic-field/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic-field/preview" class="tagItem tagItem--tag_magnetic-field" dir="auto"> <em class="textHighlight">Magnetic</em> field </a> <a href="/tags/magnetostatic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetostatic/preview" class="tagItem tagItem--tag_magnetostatic" dir="auto"> Magnetostatic </a> <a href="/tags/sphere/" data-xf-init="preview-tooltip" data-preview-url="/tags/sphere/preview" class="tagItem tagItem--tag_sphere" dir="auto"> Sphere </a> <a href="/tags/uniform/" data-xf-init="preview-tooltip" data-preview-url="/tags/uniform/preview" class="tagItem tagItem--tag_uniform" dir="auto"> Uniform </a> <a href="/tags/uniform-magnetic-field/" data-xf-init="preview-tooltip" data-preview-url="/tags/uniform-magnetic-field/preview" class="tagItem tagItem--tag_uniform-magnetic-field" dir="auto"> Uniform <em class="textHighlight">magnetic</em> field </a> </span> </dd> </dl> </li> <li>Replies: 13</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="mahblah"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/mahblah.339595/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="339595" data-xf-init="member-tooltip" style="background-color: #993366; color: #df9fbf"> <span class="avatar-u339595-s" role="img" aria-label="mahblah">M</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/electron-in-a-time-variable-magnetic-field.1052118/">Electron in a time variable magnetic field</a> </h3> <div class="contentRow-snippet">TL;DR Summary: Find acceleration of electron in dB/dt >0 Hello. Here is a problem that i'm not so sure about: Inside a solenoid there is a time-dipendent magnetic field B, so we have dB/dt = b (constant). We want to know the acceleration of an electron: a) placed in the center of the solenoid...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/mahblah.339595/" class="username " dir="auto" data-user-id="339595" data-xf-init="member-tooltip">mahblah</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2023-05-01T16:06:52-0500" data-time="1682975212" data-date-string="May 1, 2023" data-time-string="4:06 PM" title="May 1, 2023 at 4:06 PM">May 1, 2023</time></li> <li> <dl class="tagList tagList--thread-1052118 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/acceleration/" data-xf-init="preview-tooltip" data-preview-url="/tags/acceleration/preview" class="tagItem tagItem--tag_acceleration" dir="auto"> Acceleration </a> <a href="/tags/electron/" data-xf-init="preview-tooltip" data-preview-url="/tags/electron/preview" class="tagItem tagItem--tag_electron" dir="auto"> Electron </a> <a href="/tags/faradays-law-2/" data-xf-init="preview-tooltip" data-preview-url="/tags/faradays-law-2/preview" class="tagItem tagItem--tag_faradays-law-2" dir="auto"> Faraday's law </a> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/magnetic-field/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic-field/preview" class="tagItem tagItem--tag_magnetic-field" dir="auto"> <em class="textHighlight">Magnetic</em> field </a> <a href="/tags/solenoid/" data-xf-init="preview-tooltip" data-preview-url="/tags/solenoid/preview" class="tagItem tagItem--tag_solenoid" dir="auto"> Solenoid </a> <a href="/tags/time/" data-xf-init="preview-tooltip" data-preview-url="/tags/time/preview" class="tagItem tagItem--tag_time" dir="auto"> Time </a> <a href="/tags/variable/" data-xf-init="preview-tooltip" data-preview-url="/tags/variable/preview" class="tagItem tagItem--tag_variable" dir="auto"> Variable </a> </span> </dd> </dl> </li> <li>Replies: 5</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="BillKet"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/billket.637596/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="637596" data-xf-init="member-tooltip" style="background-color: #5c7a1f; color: #b8db70"> <span class="avatar-u637596-s" role="img" aria-label="BillKet">B</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/how-to-depict-a-nuclear-magnetic-octupole.1052058/"><span class="prefix inter" dir="auto">I</span><span class="label-append"> </span>How to depict a nuclear magnetic octupole</a> </h3> <div class="contentRow-snippet">Hello! I am not sure if this is the best place for this question, but I want to make a simple illustrative drawing (for a presentation given to people both with and without physics knowledge) of a nuclear magnetic octupole moment. For example for a magnetic dipole I can use a magnet as a...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/billket.637596/" class="username " dir="auto" data-user-id="637596" data-xf-init="member-tooltip">BillKet</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2023-04-29T22:48:16-0500" data-time="1682826496" data-date-string="Apr 29, 2023" data-time-string="10:48 PM" title="Apr 29, 2023 at 10:48 PM">Apr 29, 2023</time></li> <li> <dl class="tagList tagList--thread-1052058 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/nuclear/" data-xf-init="preview-tooltip" data-preview-url="/tags/nuclear/preview" class="tagItem tagItem--tag_nuclear" dir="auto"> Nuclear </a> </span> </dd> </dl> </li> <li>Replies: 3</li> <li>Forum: <a href="/forums/high-energy-nuclear-particle-physics.65/">High Energy, Nuclear, Particle Physics</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="maksym_slnc"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/maksym_slnc.735438/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="735438" data-xf-init="member-tooltip" style="background-color: #a88a8a; color: #493636"> <span class="avatar-u735438-s" role="img" aria-label="maksym_slnc">M</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/faradays-law-and-magnetic-fields.1051829/">Faraday's law and Magnetic Fields</a> </h3> <div class="contentRow-snippet">I am not really sure which direction i am moving in with this solution</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/maksym_slnc.735438/" class="username " dir="auto" data-user-id="735438" data-xf-init="member-tooltip">maksym_slnc</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2023-04-21T07:23:41-0500" data-time="1682079821" data-date-string="Apr 21, 2023" data-time-string="7:23 AM" title="Apr 21, 2023 at 7:23 AM">Apr 21, 2023</time></li> <li> <dl class="tagList tagList--thread-1051829 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/faradays-law-2/" data-xf-init="preview-tooltip" data-preview-url="/tags/faradays-law-2/preview" class="tagItem tagItem--tag_faradays-law-2" dir="auto"> Faraday's law </a> <a href="/tags/fields/" data-xf-init="preview-tooltip" data-preview-url="/tags/fields/preview" class="tagItem tagItem--tag_fields" dir="auto"> Fields </a> <a href="/tags/law/" data-xf-init="preview-tooltip" data-preview-url="/tags/law/preview" class="tagItem tagItem--tag_law" dir="auto"> Law </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/magnetic-fields/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic-fields/preview" class="tagItem tagItem--tag_magnetic-fields" dir="auto"> <em class="textHighlight">Magnetic</em> fields </a> </span> </dd> </dl> </li> <li>Replies: 3</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="StoyanNikolov"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/stoyannikolov.732836/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="732836" data-xf-init="member-tooltip" style="background-color: #33cc66; color: #0f3d1f"> <span class="avatar-u732836-s" role="img" aria-label="StoyanNikolov">S</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/can-electromagnetic-fields-generate-net-thrust-with-a-metal-plate.1051742/">Can Electromagnetic Fields Generate Net Thrust with a Metal Plate?</a> </h3> <div class="contentRow-snippet">while browsing for new propulsion methods I found the following interesting: https://en.wikipedia.org/wiki/Radiation_pressure "Radiation pressure (also known as light pressure) is the mechanical pressure exerted upon any surface due to the exchange of momentum between the object and the...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/stoyannikolov.732836/" class="username " dir="auto" data-user-id="732836" data-xf-init="member-tooltip">StoyanNikolov</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2023-04-18T05:02:17-0500" data-time="1681812137" data-date-string="Apr 18, 2023" data-time-string="5:02 AM" title="Apr 18, 2023 at 5:02 AM">Apr 18, 2023</time></li> <li> <dl class="tagList tagList--thread-1051742 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/fields/" data-xf-init="preview-tooltip" data-preview-url="/tags/fields/preview" class="tagItem tagItem--tag_fields" dir="auto"> Fields </a> <a href="/tags/light/" data-xf-init="preview-tooltip" data-preview-url="/tags/light/preview" class="tagItem tagItem--tag_light" dir="auto"> Light </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/magnetic-fields/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic-fields/preview" class="tagItem tagItem--tag_magnetic-fields" dir="auto"> <em class="textHighlight">Magnetic</em> fields </a> <a href="/tags/propulsion/" data-xf-init="preview-tooltip" data-preview-url="/tags/propulsion/preview" class="tagItem tagItem--tag_propulsion" dir="auto"> Propulsion </a> </span> </dd> </dl> </li> <li>Replies: 5</li> <li>Forum: <a href="/forums/aerospace-engineering.288/">Aerospace Engineering</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="ssarpal"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/ssarpal.729743/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="729743" data-xf-init="member-tooltip" style="background-color: #f0c2c2; color: #cc3333"> <span class="avatar-u729743-s" role="img" aria-label="ssarpal">S</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/magnetic-field-force-between-two-perpendicular-wires.1051508/">Magnetic field force between two perpendicular wires</a> </h3> <div class="contentRow-snippet">There are a couple of problems with the same setup. On plugging in the values and solving for the integral, I am not getting the expected values of the force. Is there something wrong in the solution attached?</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/ssarpal.729743/" class="username " dir="auto" data-user-id="729743" data-xf-init="member-tooltip">ssarpal</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2023-04-10T01:19:43-0500" data-time="1681107583" data-date-string="Apr 10, 2023" data-time-string="1:19 AM" title="Apr 10, 2023 at 1:19 AM">Apr 10, 2023</time></li> <li> <dl class="tagList tagList--thread-1051508 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/force/" data-xf-init="preview-tooltip" data-preview-url="/tags/force/preview" class="tagItem tagItem--tag_force" dir="auto"> Force </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/magnetic-field/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic-field/preview" class="tagItem tagItem--tag_magnetic-field" dir="auto"> <em class="textHighlight">Magnetic</em> field </a> <a href="/tags/perpendicular/" data-xf-init="preview-tooltip" data-preview-url="/tags/perpendicular/preview" class="tagItem tagItem--tag_perpendicular" dir="auto"> Perpendicular </a> <a href="/tags/wires/" data-xf-init="preview-tooltip" data-preview-url="/tags/wires/preview" class="tagItem tagItem--tag_wires" dir="auto"> Wires </a> </span> </dd> </dl> </li> <li>Replies: 1</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> <li class="block-row block-row--separated js-inlineModContainer" data-author="frankifur"> <div class="contentRow "> <span class="contentRow-figure"> <a href="/members/frankifur.733415/" class="avatar avatar--s avatar--default avatar--default--dynamic" data-user-id="733415" data-xf-init="member-tooltip" style="background-color: #666699; color: #d1d1e0"> <span class="avatar-u733415-s" role="img" aria-label="frankifur">F</span> </a> </span> <div class="contentRow-main"> <h3 class="contentRow-title"> <a href="/threads/determining-radius-from-magnetic-field-of-a-single-wire-loop.1051418/">Determining Radius from Magnetic Field of a Single-Wire Loop</a> </h3> <div class="contentRow-snippet">So I thought I knew how to do this problem but I've run into some issues that make the algebra feel impossible and I am beginning to feel like I'm taking the wrong approach, I ended up rewriting it in a doc because I was concerned maybe my handwriting was the cause of my error so the work is...</div> <div class="contentRow-minor contentRow-minor--hideLinks"> <ul class="listInline listInline--bullet"> <li><a href="/members/frankifur.733415/" class="username " dir="auto" data-user-id="733415" data-xf-init="member-tooltip">frankifur</a></li> <li>Thread</li> <li><time class="u-dt" dir="auto" datetime="2023-04-05T21:11:53-0500" data-time="1680747113" data-date-string="Apr 5, 2023" data-time-string="9:11 PM" title="Apr 5, 2023 at 9:11 PM">Apr 5, 2023</time></li> <li> <dl class="tagList tagList--thread-1051418 contentRow-minor"> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/field/" data-xf-init="preview-tooltip" data-preview-url="/tags/field/preview" class="tagItem tagItem--tag_field" dir="auto"> Field </a> <a href="/tags/loop/" data-xf-init="preview-tooltip" data-preview-url="/tags/loop/preview" class="tagItem tagItem--tag_loop" dir="auto"> Loop </a> <a href="/tags/magnetic/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic/preview" class="tagItem tagItem--tag_magnetic" dir="auto"> <em class="textHighlight">Magnetic</em> </a> <a href="/tags/magnetic-field/" data-xf-init="preview-tooltip" data-preview-url="/tags/magnetic-field/preview" class="tagItem tagItem--tag_magnetic-field" dir="auto"> <em class="textHighlight">Magnetic</em> field </a> <a href="/tags/radius/" data-xf-init="preview-tooltip" data-preview-url="/tags/radius/preview" class="tagItem tagItem--tag_radius" dir="auto"> Radius </a> </span> </dd> </dl> </li> <li>Replies: 4</li> <li>Forum: <a href="/forums/introductory-physics-homework-help.153/">Introductory Physics Homework Help</a></li> </ul> </div> </div> </div> </li> </ol> </div> <div class="block-outer block-outer--after"> <div class="block-outer-main"> <nav class="pageNavWrapper pageNavWrapper--logarithmic pageNavWrapper--full " data-block-size="3" data-last-page="20"> <div class="pageNav"> <ul class="pageNav-main"> <li 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