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id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Облик"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Облик" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Облик</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_bg.wikipedia.org&uselang=bg" class=""><span>Направете дарение</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:%D0%A1%D1%8A%D0%B7%D0%B4%D0%B0%D0%B2%D0%B0%D0%BD%D0%B5_%D0%BD%D0%B0_%D1%81%D0%BC%D0%B5%D1%82%D0%BA%D0%B0&returnto=%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0+%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F" title="Насърчаваме Ви да си създадете сметка и да влезете, въпреки че не е задължително." class=""><span>Създаване на сметка</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:%D0%A0%D0%B5%D0%B3%D0%B8%D1%81%D1%82%D1%80%D0%B8%D1%80%D0%B0%D0%BD%D0%B5_%D0%B8%D0%BB%D0%B8_%D0%B2%D0%BB%D0%B8%D0%B7%D0%B0%D0%BD%D0%B5&returnto=%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0+%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F" title="Препоръчваме Ви да влезете, въпреки, че не е задължително. [o]" accesskey="o" class=""><span>Влизане</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Допълнителни опции" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Лични инструменти" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Лични инструменти</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Потребителско меню" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_bg.wikipedia.org&uselang=bg"><span>Направете дарение</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:%D0%A1%D1%8A%D0%B7%D0%B4%D0%B0%D0%B2%D0%B0%D0%BD%D0%B5_%D0%BD%D0%B0_%D1%81%D0%BC%D0%B5%D1%82%D0%BA%D0%B0&returnto=%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0+%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F" title="Насърчаваме Ви да си създадете сметка и да влезете, въпреки че не е задължително."><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Създаване на сметка</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:%D0%A0%D0%B5%D0%B3%D0%B8%D1%81%D1%82%D1%80%D0%B8%D1%80%D0%B0%D0%BD%D0%B5_%D0%B8%D0%BB%D0%B8_%D0%B2%D0%BB%D0%B8%D0%B7%D0%B0%D0%BD%D0%B5&returnto=%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0+%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F" title="Препоръчваме Ви да влезете, въпреки, че не е задължително. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Влизане</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Страници за излезли от системата редактори <a href="/wiki/%D0%9F%D0%BE%D0%BC%D0%BE%D1%89:%D0%92%D1%8A%D0%B2%D0%B5%D0%B4%D0%B5%D0%BD%D0%B8%D0%B5" aria-label="Научете повече за редактирането"><span>научете повече</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:%D0%9C%D0%BE%D0%B8%D1%82%D0%B5_%D0%BF%D1%80%D0%B8%D0%BD%D0%BE%D1%81%D0%B8" title="Списък на промените, направени от този IP адрес [y]" accesskey="y"><span>Приноси</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:%D0%9C%D0%BE%D1%8F%D1%82%D0%B0_%D0%B1%D0%B5%D1%81%D0%B5%D0%B4%D0%B0" title="Дискусия относно редакциите от този адрес [n]" accesskey="n"><span>Беседа</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Сайт"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Магнитна индукция</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Към статията на друг език. Налична на 40 езика" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-40" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">40 езика</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-als mw-list-item"><a href="https://als.wikipedia.org/wiki/Magnetische_Flussdichte" title="Magnetische Flussdichte – швейцарски немски" lang="gsw" hreflang="gsw" data-title="Magnetische Flussdichte" data-language-autonym="Alemannisch" data-language-local-name="швейцарски немски" class="interlanguage-link-target"><span>Alemannisch</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%83%D8%AB%D8%A7%D9%81%D8%A9_%D8%A7%D9%84%D9%81%D9%8A%D8%B6_%D8%A7%D9%84%D9%85%D8%BA%D9%86%D8%A7%D8%B7%D9%8A%D8%B3%D9%8A" title="كثافة الفيض المغناطيسي – арабски" lang="ar" hreflang="ar" data-title="كثافة الفيض المغناطيسي" data-language-autonym="العربية" data-language-local-name="арабски" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Maqnit_induksiyas%C4%B1" title="Maqnit induksiyası – азербайджански" lang="az" hreflang="az" data-title="Maqnit induksiyası" data-language-autonym="Azərbaycanca" data-language-local-name="азербайджански" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bar mw-list-item"><a href="https://bar.wikipedia.org/wiki/Magnetische_Flussdichtn" title="Magnetische Flussdichtn – Bavarian" lang="bar" hreflang="bar" data-title="Magnetische Flussdichtn" data-language-autonym="Boarisch" data-language-local-name="Bavarian" class="interlanguage-link-target"><span>Boarisch</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D1%96%D1%82%D0%BD%D0%B0%D1%8F_%D1%96%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D1%8B%D1%8F" title="Магнітная індукцыя – беларуски" lang="be" hreflang="be" data-title="Магнітная індукцыя" data-language-autonym="Беларуская" data-language-local-name="беларуски" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Densitat_de_flux_magn%C3%A8tic" title="Densitat de flux magnètic – каталонски" lang="ca" hreflang="ca" data-title="Densitat de flux magnètic" data-language-autonym="Català" data-language-local-name="каталонски" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Magnetick%C3%A1_indukce" title="Magnetická indukce – чешки" lang="cs" hreflang="cs" data-title="Magnetická indukce" data-language-autonym="Čeština" data-language-local-name="чешки" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BB%D0%B0_%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8" title="Магнитла индукци – чувашки" lang="cv" hreflang="cv" data-title="Магнитла индукци" data-language-autonym="Чӑвашла" data-language-local-name="чувашки" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Magnetische_Flussdichte" title="Magnetische Flussdichte – немски" lang="de" hreflang="de" data-title="Magnetische Flussdichte" data-language-autonym="Deutsch" data-language-local-name="немски" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en badge-Q70893996 mw-list-item" title=""><a href="https://en.wikipedia.org/wiki/Magnetic_flux_density" title="Magnetic flux density – английски" lang="en" hreflang="en" data-title="Magnetic flux density" data-language-autonym="English" data-language-local-name="английски" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Magneta_fluksdenso" title="Magneta fluksdenso – есперанто" lang="eo" hreflang="eo" data-title="Magneta fluksdenso" data-language-autonym="Esperanto" data-language-local-name="есперанто" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Inducci%C3%B3n_magn%C3%A9tica" title="Inducción magnética – испански" lang="es" hreflang="es" data-title="Inducción magnética" data-language-autonym="Español" data-language-local-name="испански" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Magnetiline_induktsioon" title="Magnetiline induktsioon – естонски" lang="et" hreflang="et" data-title="Magnetiline induktsioon" data-language-autonym="Eesti" data-language-local-name="естонски" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Indukzio_magnetiko" title="Indukzio magnetiko – баски" lang="eu" hreflang="eu" data-title="Indukzio magnetiko" data-language-autonym="Euskara" data-language-local-name="баски" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%DA%86%DA%AF%D8%A7%D9%84%DB%8C_%D8%B4%D8%A7%D8%B1_%D9%85%D8%BA%D9%86%D8%A7%D8%B7%DB%8C%D8%B3%DB%8C" title="چگالی شار مغناطیسی – персийски" lang="fa" hreflang="fa" data-title="چگالی شار مغناطیسی" data-language-autonym="فارسی" data-language-local-name="персийски" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Magneettivuon_tiheys" title="Magneettivuon tiheys – фински" lang="fi" hreflang="fi" data-title="Magneettivuon tiheys" data-language-autonym="Suomi" data-language-local-name="фински" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Intensit%C3%A9_de_champ_magn%C3%A9tique" title="Intensité de champ magnétique – френски" lang="fr" hreflang="fr" data-title="Intensité de champ magnétique" data-language-autonym="Français" data-language-local-name="френски" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/Magneetisk_struumm%C3%A4%C3%A4cht" title="Magneetisk struummäächt – северен фризийски" lang="frr" hreflang="frr" data-title="Magneetisk struummäächt" data-language-autonym="Nordfriisk" data-language-local-name="северен фризийски" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Induci%C3%B3n_magn%C3%A9tica" title="Indución magnética – галисийски" lang="gl" hreflang="gl" data-title="Indución magnética" data-language-autonym="Galego" data-language-local-name="галисийски" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Magnetska_indukcija" title="Magnetska indukcija – хърватски" lang="hr" hreflang="hr" data-title="Magnetska indukcija" data-language-autonym="Hrvatski" data-language-local-name="хърватски" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/M%C3%A1gneses_indukci%C3%B3" title="Mágneses indukció – унгарски" lang="hu" hreflang="hu" data-title="Mágneses indukció" data-language-autonym="Magyar" data-language-local-name="унгарски" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%84%D5%A1%D5%A3%D5%B6%D5%AB%D5%BD%D5%A1%D5%AF%D5%A1%D5%B6_%D5%AB%D5%B6%D5%A4%D5%B8%D6%82%D5%AF%D6%81%D5%AB%D5%A1" title="Մագնիսական ինդուկցիա – арменски" lang="hy" hreflang="hy" data-title="Մագնիսական ինդուկցիա" data-language-autonym="Հայերեն" data-language-local-name="арменски" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E7%A3%81%E6%9D%9F%E5%AF%86%E5%BA%A6" title="磁束密度 – японски" lang="ja" hreflang="ja" data-title="磁束密度" data-language-autonym="日本語" data-language-local-name="японски" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%9B%E1%83%90%E1%83%92%E1%83%9C%E1%83%98%E1%83%A2%E1%83%A3%E1%83%A0%E1%83%98_%E1%83%98%E1%83%9C%E1%83%93%E1%83%A3%E1%83%A5%E1%83%AA%E1%83%98%E1%83%90" title="მაგნიტური ინდუქცია – грузински" lang="ka" hreflang="ka" data-title="მაგნიტური ინდუქცია" data-language-autonym="ქართული" data-language-local-name="грузински" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D1%82%D1%96%D0%BA_%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F" title="Магниттік индукция – казахски" lang="kk" hreflang="kk" data-title="Магниттік индукция" data-language-autonym="Қазақша" data-language-local-name="казахски" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Magn%C4%93tisk%C4%81_lauka_indukcija" title="Magnētiskā lauka indukcija – латвийски" lang="lv" hreflang="lv" data-title="Magnētiskā lauka indukcija" data-language-autonym="Latviešu" data-language-local-name="латвийски" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B5%D1%82%D0%BD%D0%B0_%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%98%D0%B0" title="Магнетна индукција – македонски" lang="mk" hreflang="mk" data-title="Магнетна индукција" data-language-autonym="Македонски" data-language-local-name="македонски" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Magnetische_fluxdichtheid" title="Magnetische fluxdichtheid – нидерландски" lang="nl" hreflang="nl" data-title="Magnetische fluxdichtheid" data-language-autonym="Nederlands" data-language-local-name="нидерландски" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Magnetisk_flukstettleik" title="Magnetisk flukstettleik – норвежки (нюношк)" lang="nn" hreflang="nn" data-title="Magnetisk flukstettleik" data-language-autonym="Norsk nynorsk" data-language-local-name="норвежки (нюношк)" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Indukcja_magnetyczna" title="Indukcja magnetyczna – полски" lang="pl" hreflang="pl" data-title="Indukcja magnetyczna" data-language-autonym="Polski" data-language-local-name="полски" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0%D1%8F_%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F" title="Магнитная индукция – руски" lang="ru" hreflang="ru" data-title="Магнитная индукция" data-language-autonym="Русский" data-language-local-name="руски" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Magnetick%C3%A1_indukcia" title="Magnetická indukcia – словашки" lang="sk" hreflang="sk" data-title="Magnetická indukcia" data-language-autonym="Slovenčina" data-language-local-name="словашки" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Gostota_magnetnega_polja" title="Gostota magnetnega polja – словенски" lang="sl" hreflang="sl" data-title="Gostota magnetnega polja" data-language-autonym="Slovenščina" data-language-local-name="словенски" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%93%D1%83%D1%81%D1%82%D0%B8%D0%BD%D0%B0_%D0%BC%D0%B0%D0%B3%D0%BD%D0%B5%D1%82%D1%81%D0%BA%D0%BE%D0%B3_%D1%84%D0%BB%D1%83%D0%BA%D1%81%D0%B0" title="Густина магнетског флукса – сръбски" lang="sr" hreflang="sr" data-title="Густина магнетског флукса" data-language-autonym="Српски / srpski" data-language-local-name="сръбски" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv badge-Q70894304 mw-list-item" title=""><a href="https://sv.wikipedia.org/wiki/Magnetisk_fl%C3%B6dest%C3%A4thet" title="Magnetisk flödestäthet – шведски" lang="sv" hreflang="sv" data-title="Magnetisk flödestäthet" data-language-autonym="Svenska" data-language-local-name="шведски" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82_%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F%D1%81%D0%B5" title="Магнит индукциясе – татарски" lang="tt" hreflang="tt" data-title="Магнит индукциясе" data-language-autonym="Татарча / tatarça" data-language-local-name="татарски" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D1%96%D1%82%D0%BD%D0%B0_%D1%96%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D1%96%D1%8F" title="Магнітна індукція – украински" lang="uk" hreflang="uk" data-title="Магнітна індукція" data-language-autonym="Українська" data-language-local-name="украински" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Magnit_induksiya" title="Magnit induksiya – узбекски" lang="uz" hreflang="uz" data-title="Magnit induksiya" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="узбекски" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E7%A3%81%E6%84%9F%E5%BA%94%E5%BC%BA%E5%BA%A6" title="磁感应强度 – ву китайски" lang="wuu" hreflang="wuu" data-title="磁感应强度" data-language-autonym="吴语" data-language-local-name="ву китайски" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%A3%81%E6%84%9F%E5%BA%94%E5%BC%BA%E5%BA%A6" title="磁感应强度 – китайски" lang="zh" hreflang="zh" data-title="磁感应强度" data-language-autonym="中文" data-language-local-name="китайски" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q30204#sitelinks-wikipedia" title="Редактиране на междуезиковите препратки" class="wbc-editpage">Редактиране</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Именни пространства"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0_%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F" title="Преглед на основната 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href="/w/index.php?title=%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0_%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F&veaction=edit" title="Редактиране на страницата [v]" accesskey="v"><span>Редактиране</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0_%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F&action=edit" title="Редактиране на изходния код на страницата [e]" accesskey="e"><span>Редактиране на кода</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0_%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F&action=history"><span>История</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Основни </div> <div class="vector-menu-content"> <ul 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href="/w/index.php?title=%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:QrCode&url=https%3A%2F%2Fbg.wikipedia.org%2Fwiki%2F%25D0%259C%25D0%25B0%25D0%25B3%25D0%25BD%25D0%25B8%25D1%2582%25D0%25BD%25D0%25B0_%25D0%25B8%25D0%25BD%25D0%25B4%25D1%2583%25D0%25BA%25D1%2586%25D0%25B8%25D1%258F"><span>Изтегляне на QR код</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Отпечатване/изнасяне </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:Book&bookcmd=book_creator&referer=%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0+%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F"><span>Създаване на книга</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:DownloadAsPdf&page=%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0_%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F&action=show-download-screen"><span>Изтегляне като PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0_%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F&printable=yes" title="Версия за печат на страницата [p]" accesskey="p"><span>Версия за печат</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> В други проекти </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q30204" title="Препратка към свързания обект от хранилището за данни [g]" accesskey="g"><span>Обект в Уикиданни</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Облик"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Облик</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">преместване към страничната лента</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">скриване</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">от Уикипедия, свободната енциклопедия</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="bg" dir="ltr"><table class="metadata plainlinks ambox ambox-serious" role="presentation"><tbody><tr><td class="mbox-image"><div style="width:52px"><span typeof="mw:File"><a href="/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Question_book-4.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/64/Question_book-4.svg/40px-Question_book-4.svg.png" decoding="async" width="40" height="31" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/64/Question_book-4.svg/60px-Question_book-4.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/64/Question_book-4.svg/80px-Question_book-4.svg.png 2x" data-file-width="262" data-file-height="204" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">За информацията в тази статия или раздел <b>не са <a href="/wiki/%D0%A3%D0%B8%D0%BA%D0%B8%D0%BF%D0%B5%D0%B4%D0%B8%D1%8F:%D0%A6%D0%B8%D1%82%D0%B8%D1%80%D0%B0%D0%BD%D0%B5_%D0%BD%D0%B0_%D0%B8%D0%B7%D1%82%D0%BE%D1%87%D0%BD%D0%B8%D1%86%D0%B8" title="Уикипедия:Цитиране на източници">посочени източници</a>.</b> Въпросната информация може да е непълна, неточна или изцяло невярна.<br />Имайте предвид, че това може да стане причина за <a href="/wiki/%D0%A3%D0%B8%D0%BA%D0%B8%D0%BF%D0%B5%D0%B4%D0%B8%D1%8F:%D0%98%D0%B7%D1%82%D1%80%D0%B8%D0%B2%D0%B0%D0%BD%D0%B5_%D0%BD%D0%B0_%D1%81%D1%82%D1%80%D0%B0%D0%BD%D0%B8%D1%86%D0%B8_%D0%B8_%D1%84%D0%B0%D0%B9%D0%BB%D0%BE%D0%B2%D0%B5" title="Уикипедия:Изтриване на страници и файлове">изтриването</a> на цялата статия или раздел.<span class="hide-when-compact"></span><span class="hide-when-compact"></span></div></td><td class="mbox-imageright"><div style="width:52px"><span typeof="mw:File"><a href="/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Nuvola_apps_important.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f7/Nuvola_apps_important.svg/40px-Nuvola_apps_important.svg.png" decoding="async" width="40" height="33" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f7/Nuvola_apps_important.svg/60px-Nuvola_apps_important.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f7/Nuvola_apps_important.svg/80px-Nuvola_apps_important.svg.png 2x" data-file-width="600" data-file-height="500" /></a></span></div></td></tr></tbody></table> <table class="vertical-navbox nowraplinks" style="float:right;clear:right;width:22.0em;margin:0 0 1.0em 1.0em;background:#f9f9f9;border:1px solid #aaa;padding:0.2em;border-spacing:0.4em 0;text-align:center;line-height:1.4em;font-size:88%"><tbody><tr><td style="padding-top:0.4em;line-height:1.2em">Серия статии на тема</td></tr><tr><th class="title physic" style="padding:0.2em 0.4em 0.2em;padding-top:0;font-size:145%;line-height:1.2em;background-color:#D4D4FF; padding: 0.7em"><a href="/wiki/%D0%9A%D0%BB%D0%B0%D1%81%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0_%D0%B5%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%B4%D0%B8%D0%BD%D0%B0%D0%BC%D0%B8%D0%BA%D0%B0" class="mw-redirect" title="Класическа електродинамика">Класическа електродинамика</a></th></tr><tr><td style="padding:0.2em 0 0.4em"><span typeof="mw:File/Frameless"><a href="/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:CoulombsLaw.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/07/CoulombsLaw.svg/190px-CoulombsLaw.svg.png" decoding="async" width="190" height="152" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/07/CoulombsLaw.svg/285px-CoulombsLaw.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/07/CoulombsLaw.svg/380px-CoulombsLaw.svg.png 2x" data-file-width="512" data-file-height="410" /></a></span></td></tr><tr><td class="hlist" style="padding:0 0.1em 0.4em"> <ul><li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D1%82%D0%B2%D0%BE" title="Електричество">Електричество</a></li> <li><a href="/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B5%D1%82%D0%B8%D0%B7%D1%8A%D0%BC" title="Магнетизъм">Магнетизъм</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%BC%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%BE_%D0%B2%D0%B7%D0%B0%D0%B8%D0%BC%D0%BE%D0%B4%D0%B5%D0%B9%D1%81%D1%82%D0%B2%D0%B8%D0%B5" title="Електромагнитно взаимодействие">Електромагнетизъм</a></li></ul></td> </tr><tr><td class="hlist" style="padding:0 0.1em 0.4em"> <div class="mw-collapsible mw-collapsed" style="border:none;padding:0"><div style="font-size:105%;background:transparent;text-align:left;font-weight:bold"><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D1%81%D1%82%D0%B0%D1%82%D0%B8%D0%BA%D0%B0" title="Електростатика">Електростатика</a></div><div class="mw-collapsible-content hlist" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center"> <ul><li><a href="/wiki/%D0%97%D0%B0%D0%BA%D0%BE%D0%BD_%D0%BD%D0%B0_%D0%9A%D1%83%D0%BB%D0%BE%D0%BD" title="Закон на Кулон">Закон на Кулон</a></li> <li><a href="/wiki/%D0%A2%D0%B5%D0%BE%D1%80%D0%B5%D0%BC%D0%B0_%D0%BD%D0%B0_%D0%93%D0%B0%D1%83%D1%81" title="Теорема на Гаус">Теорема на Гаус</a></li> <li><a href="/wiki/%D0%94%D0%B8%D0%BF%D0%BE%D0%BB" title="Дипол">Електрически дипол</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8_%D0%B7%D0%B0%D1%80%D1%8F%D0%B4" title="Електрически заряд">Електрически заряд</a></li> <li><a href="/wiki/%D0%98%D0%BD%D1%82%D0%B5%D0%BD%D0%B7%D0%B8%D1%82%D0%B5%D1%82_%D0%BD%D0%B0_%D0%B5%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%BE%D1%82%D0%BE_%D0%BF%D0%BE%D0%BB%D0%B5" title="Интензитет на електрическото поле">Интензитет на електрическото поле</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%BD%D0%BE_%D0%BF%D0%BE%D0%BB%D0%B5" class="mw-redirect" title="Електрично поле">Електрично поле</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D0%BD_%D0%BF%D0%BE%D1%82%D0%B5%D0%BD%D1%86%D0%B8%D0%B0%D0%BB" title="Електричен потенциал">Електричен потенциал</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B5%D1%82" title="Електрет">Електрет</a></li></ul></div></div></td> </tr><tr><td class="hlist" style="padding:0 0.1em 0.4em"> <div class="mw-collapsible mw-collapsed" style="border:none;padding:0"><div style="font-size:105%;background:transparent;text-align:left;font-weight:bold"><a href="/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BE%D1%81%D1%82%D0%B0%D1%82%D0%B8%D0%BA%D0%B0" title="Магнитостатика">Магнитостатика</a></div><div class="mw-collapsible-content hlist" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center"> <ul><li><a href="/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82" title="Магнит">Магнит</a></li> <li><a href="/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%BE_%D0%BF%D0%BE%D0%BB%D0%B5" title="Магнитно поле">Магнитно поле</a></li> <li><a href="/wiki/%D0%94%D0%B8%D0%BF%D0%BE%D0%BB" title="Дипол">Дипол</a></li> <li><a href="/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%B5%D0%BD_%D0%BF%D0%BE%D1%82%D0%BE%D0%BA" title="Магнитен поток">Магнитен поток</a></li> <li><a class="mw-selflink selflink">Магнитна индукция</a></li> <li><a href="/wiki/%D0%98%D0%BD%D1%82%D0%B5%D0%BD%D0%B7%D0%B8%D1%82%D0%B5%D1%82_%D0%BD%D0%B0_%D0%BC%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%BE%D1%82%D0%BE_%D0%BF%D0%BE%D0%BB%D0%B5" title="Интензитет на магнитното поле">Интензитет на магнитното поле</a></li> <li><a href="/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0_%D0%BF%D1%80%D0%BE%D0%BD%D0%B8%D1%86%D0%B0%D0%B5%D0%BC%D0%BE%D1%81%D1%82" title="Магнитна проницаемост">Магнитна проницаемост</a></li> <li><a href="/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0_%D0%B2%D1%8A%D0%B7%D0%BF%D1%80%D0%B8%D0%B5%D0%BC%D1%87%D0%B8%D0%B2%D0%BE%D1%81%D1%82" title="Магнитна възприемчивост">Магнитна възприемчивост</a></li> <li><a href="/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%B5%D0%BD_%D0%BC%D0%BE%D0%BC%D0%B5%D0%BD%D1%82" title="Магнитен момент">Магнитен момент</a></li> <li><a href="/wiki/%D0%9D%D0%B0%D0%BC%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%B2%D0%B0%D0%BD%D0%B5" title="Намагнитване">Намагнитване</a></li> <li><a href="/wiki/%D0%A4%D0%B5%D1%80%D0%BE%D0%BC%D0%B0%D0%B3%D0%BD%D0%B5%D1%82%D0%B8%D0%B7%D1%8A%D0%BC" title="Феромагнетизъм">Феромагнетизъм</a></li> <li><a href="/wiki/%D0%94%D0%B8%D0%B0%D0%BC%D0%B0%D0%B3%D0%BD%D0%B5%D1%82%D0%B8%D0%B7%D1%8A%D0%BC" title="Диамагнетизъм">Диамагнетизъм</a></li> <li><a href="/wiki/%D0%9F%D0%B0%D1%80%D0%B0%D0%BC%D0%B0%D0%B3%D0%BD%D0%B5%D1%82%D0%B8%D0%B7%D1%8A%D0%BC" title="Парамагнетизъм">Парамагнетизъм</a></li> <li><a href="/wiki/%D0%A1%D1%83%D0%BF%D0%B5%D1%80%D0%BF%D0%B0%D1%80%D0%B0%D0%BC%D0%B0%D0%B3%D0%BD%D0%B5%D1%82%D0%B8%D0%B7%D1%8A%D0%BC" title="Суперпарамагнетизъм">Суперпарамагнетизъм</a></li> <li><a href="/wiki/%D0%90%D0%BD%D1%82%D0%B8%D1%84%D0%B5%D1%80%D0%BE%D0%BC%D0%B0%D0%B3%D0%BD%D0%B5%D1%82%D0%B8%D0%B7%D1%8A%D0%BC" title="Антиферомагнетизъм">Антиферомагнетизъм</a></li> <li><a href="/wiki/%D0%A4%D0%B5%D1%80%D0%B8%D0%BC%D0%B0%D0%B3%D0%BD%D0%B5%D1%82%D0%B8%D0%B7%D1%8A%D0%BC" title="Феримагнетизъм">Феримагнетизъм</a></li> <li><a href="/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0_%D0%BB%D0%B5%D0%B2%D0%B8%D1%82%D0%B0%D1%86%D0%B8%D1%8F" title="Магнитна левитация">Магнитна левитация</a></li> <li><a href="/wiki/%D0%97%D0%B0%D0%BA%D0%BE%D0%BD_%D0%BD%D0%B0_%D0%91%D0%B8%D0%BE-%D0%A1%D0%B0%D0%B2%D0%B0%D1%80" title="Закон на Био-Савар">Закон на Био-Савар</a></li> <li><a href="/wiki/%D0%97%D0%B0%D0%BA%D0%BE%D0%BD_%D0%BD%D0%B0_%D0%90%D0%BC%D0%BF%D0%B5%D1%80" title="Закон на Ампер">Закон на Ампер</a></li></ul></div></div></td> </tr><tr><td class="hlist" style="padding:0 0.1em 0.4em"> <div class="mw-collapsible mw-collapsed" style="border:none;padding:0"><div style="font-size:105%;background:transparent;text-align:left;font-weight:bold"><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%B4%D0%B8%D0%BD%D0%B0%D0%BC%D0%B8%D0%BA%D0%B0" title="Електродинамика">Електродинамика</a></div><div class="mw-collapsible-content hlist" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center"> <ul><li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%BC%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%BE_%D0%BF%D0%BE%D0%BB%D0%B5" title="Електромагнитно поле">Електромагнитно поле</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%BC%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0_%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F" title="Електромагнитна индукция">Електромагнитна индукция</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%BC%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%BE_%D0%B8%D0%B7%D0%BB%D1%8A%D1%87%D0%B2%D0%B0%D0%BD%D0%B5" title="Електромагнитно излъчване">Електромагнитно излъчване</a></li> <li><a href="/wiki/%D0%94%D0%B8%D0%BF%D0%BE%D0%BB" title="Дипол">Дипол</a></li> <li><a href="/wiki/%D0%A1%D0%B8%D0%BB%D0%B0_%D0%BD%D0%B0_%D0%9B%D0%BE%D1%80%D0%B5%D0%BD%D1%86" title="Сила на Лоренц">Сила на Лоренц</a></li> <li><a href="/wiki/%D0%A3%D1%80%D0%B0%D0%B2%D0%BD%D0%B5%D0%BD%D0%B8%D1%8F_%D0%BD%D0%B0_%D0%9C%D0%B0%D0%BA%D1%81%D1%83%D0%B5%D0%BB" title="Уравнения на Максуел">Уравнения на Максуел</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%BC%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%B5%D0%BD_4-%D0%BF%D0%BE%D1%82%D0%B5%D0%BD%D1%86%D0%B8%D0%B0%D0%BB" title="Електромагнитен 4-потенциал">Електромагнитен 4-потенциал</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D0%BD_%D0%BF%D0%BE%D1%82%D0%B5%D0%BD%D1%86%D0%B8%D0%B0%D0%BB" title="Електричен потенциал">Електричен потенциал</a></li> <li><a href="/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%B5%D0%BD_%D0%B2%D0%B5%D0%BA%D1%82%D0%BE%D1%80%D0%B5%D0%BD_%D0%BF%D0%BE%D1%82%D0%B5%D0%BD%D1%86%D0%B8%D0%B0%D0%BB" title="Магнитен векторен потенциал">Магнитен векторен потенциал</a></li> <li><a href="/wiki/%D0%92%D1%8A%D0%BB%D0%BD%D0%BE%D0%B2%D0%BE_%D1%83%D1%80%D0%B0%D0%B2%D0%BD%D0%B5%D0%BD%D0%B8%D0%B5" title="Вълново уравнение">Вълново уравнение</a></li> <li><a href="/wiki/%D0%97%D0%B0%D0%BA%D1%8A%D1%81%D0%BD%D1%8F%D0%B2%D0%B0%D1%89_%D0%BF%D0%BE%D1%82%D0%B5%D0%BD%D1%86%D0%B8%D0%B0%D0%BB" title="Закъсняващ потенциал">Закъсняващ потенциал</a></li> <li><a href="/wiki/%D0%9E%D0%BF%D0%B5%D1%80%D0%B0%D1%82%D0%BE%D1%80_%D0%BD%D0%B0_%D0%94%27%D0%90%D0%BB%D0%B0%D0%BC%D0%B1%D0%B5%D1%80" title="Оператор на Д'Аламбер">Оператор на Д'Аламбер</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8_%D0%B4%D0%B8%D0%BF%D0%BE%D0%BB%D0%B5%D0%BD_%D0%BC%D0%BE%D0%BC%D0%B5%D0%BD%D1%82" title="Електрически диполен момент">Електрически диполен момент</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%BC%D0%B0%D0%B3%D0%BD%D0%B8%D1%82" title="Електромагнит">Електромагнит</a></li> <li><a href="/wiki/%D0%95%D1%84%D0%B5%D0%BA%D1%82_%D0%BD%D0%B0_%D0%9C%D0%B0%D0%B9%D1%81%D0%BD%D0%B5%D1%80" title="Ефект на Майснер">Ефект на Майснер</a></li></ul></div></div></td> </tr><tr><td class="hlist" style="padding:0 0.1em 0.4em"> <div class="mw-collapsible mw-collapsed" style="border:none;padding:0"><div style="font-size:105%;background:transparent;text-align:left;font-weight:bold"><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0_%D0%B2%D0%B5%D1%80%D0%B8%D0%B3%D0%B0" title="Електрическа верига">Електрическа верига</a></div><div class="mw-collapsible-content hlist" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center"> <ul><li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8_%D1%82%D0%BE%D0%BA" title="Електрически ток">Електрически ток</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%BE_%D0%BD%D0%B0%D0%BF%D1%80%D0%B5%D0%B6%D0%B5%D0%BD%D0%B8%D0%B5" title="Електрическо напрежение">Електрическо напрежение</a></li> <li><a href="/wiki/%D0%92%D0%BE%D0%BB%D1%82-%D0%B0%D0%BC%D0%BF%D0%B5%D1%80%D0%BD%D0%B0_%D1%85%D0%B0%D1%80%D0%B0%D0%BA%D1%82%D0%B5%D1%80%D0%B8%D1%81%D1%82%D0%B8%D0%BA%D0%B0" title="Волт-амперна характеристика">Волт-амперна характеристика</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%BE_%D1%81%D1%8A%D0%BF%D1%80%D0%BE%D1%82%D0%B8%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D0%B5" title="Електрическо съпротивление">Електрическо съпротивление</a></li> <li><a href="/wiki/%D0%98%D0%BD%D0%B4%D1%83%D0%BA%D1%82%D0%B8%D0%B2%D0%BD%D0%BE%D1%81%D1%82" title="Индуктивност">Индуктивност</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8_%D0%BA%D0%B0%D0%BF%D0%B0%D1%86%D0%B8%D1%82%D0%B5%D1%82" title="Електрически капацитет">Електрически капацитет</a></li> <li><a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0_%D0%BF%D1%80%D0%BE%D0%B2%D0%BE%D0%B4%D0%B8%D0%BC%D0%BE%D1%81%D1%82" title="Електрическа проводимост">Електрическа проводимост</a></li> <li><a href="/wiki/%D0%98%D0%BC%D0%BF%D0%B5%D0%B4%D0%B0%D0%BD%D1%81" title="Импеданс">Електрически импеданс</a></li> <li><a href="/wiki/%D0%97%D0%B0%D0%BA%D0%BE%D0%BD_%D0%BD%D0%B0_%D0%9E%D0%BC" title="Закон на Ом">Закон на Ом</a></li> <li><a href="/wiki/%D0%97%D0%B0%D0%BA%D0%BE%D0%BD%D0%B8_%D0%BD%D0%B0_%D0%9A%D0%B8%D1%80%D1%85%D0%BE%D1%84" title="Закони на Кирхоф">Закони на Кирхоф</a></li> <li><a href="/wiki/%D0%97%D0%B0%D0%BA%D0%BE%D0%BD_%D0%BD%D0%B0_%D0%94%D0%B6%D0%B0%D1%83%D0%BB-%D0%9B%D0%B5%D0%BD%D1%86" class="mw-redirect" title="Закон на Джаул-Ленц">Закон на Джаул-Ленц</a></li></ul></div></div></td> </tr><tr><td class="hlist" style="padding:0 0.1em 0.4em"> <div class="mw-collapsible mw-collapsed" style="border:none;padding:0"><div style="font-size:105%;background:transparent;text-align:left;font-weight:bold">Известни учени</div><div class="mw-collapsible-content hlist" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center"> <ul><li><a href="/wiki/%D0%A5%D0%B5%D0%BD%D1%80%D0%B8_%D0%9A%D0%B0%D0%B2%D0%B5%D0%BD%D0%B4%D0%B8%D1%88" title="Хенри Кавендиш">Хенри Кавендиш</a></li> <li><a href="/wiki/%D0%9C%D0%B0%D0%B9%D0%BA%D1%8A%D0%BB_%D0%A4%D0%B0%D1%80%D0%B0%D0%B4%D0%B5%D0%B9" title="Майкъл Фарадей">Майкъл Фарадей</a></li> <li><a href="/wiki/%D0%90%D0%BD%D0%B4%D1%80%D0%B5-%D0%9C%D0%B0%D1%80%D0%B8_%D0%90%D0%BC%D0%BF%D0%B5%D1%80" title="Андре-Мари Ампер">Андре-Мари Ампер</a></li> <li><a href="/wiki/%D0%93%D1%83%D1%81%D1%82%D0%B0%D0%B2_%D0%9A%D0%B8%D1%80%D1%85%D0%BE%D1%84" title="Густав Кирхоф">Густав Кирхоф</a></li> <li><a href="/wiki/%D0%94%D0%B6%D0%B5%D0%B9%D0%BC%D1%81_%D0%9A%D0%BB%D0%B0%D1%80%D0%BA_%D0%9C%D0%B0%D0%BA%D1%81%D1%83%D0%B5%D0%BB" title="Джеймс Кларк Максуел">Джеймс Кларк Максуел</a></li> <li><a href="/wiki/%D0%A5%D0%B0%D0%B9%D0%BD%D1%80%D0%B8%D1%85_%D0%A5%D0%B5%D1%80%D1%86" title="Хайнрих Херц">Хайнрих Херц</a></li> <li><a href="/wiki/%D0%90%D0%BB%D0%B1%D0%B5%D1%80%D1%82_%D0%90%D0%B1%D1%80%D0%B0%D1%85%D0%B0%D0%BC_%D0%9C%D0%B0%D0%B9%D0%BA%D0%B5%D0%BB%D1%81%D1%8A%D0%BD" class="mw-redirect" title="Алберт Абрахам Майкелсън">Алберт Абрахам Майкелсън</a></li> <li><a href="/wiki/%D0%A0%D0%BE%D0%B1%D1%8A%D1%80%D1%82_%D0%9C%D0%B8%D0%BB%D0%B8%D0%BA%D0%B0%D0%BD" title="Робърт Миликан">Робърт Миликан</a></li> <li><a href="/wiki/%D0%93%D0%B5%D0%BE%D1%80%D0%B3_%D0%9E%D0%BC" title="Георг Ом">Георг Ом</a></li> <li><a href="/wiki/%D0%9B%D1%83%D0%B8_%D0%9D%D0%B5%D0%B5%D0%BB" title="Луи Неел">Луи Неел</a></li></ul></div></div></td> </tr><tr><td style="text-align:right;font-size:115%;padding-top: 0.6em;"><div class="plainlinks hlist navbar mini"><ul><li class="nv-view"><a href="/wiki/%D0%A8%D0%B0%D0%B1%D0%BB%D0%BE%D0%BD:%D0%9A%D0%BB%D0%B0%D1%81%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0_%D0%B5%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%B4%D0%B8%D0%BD%D0%B0%D0%BC%D0%B8%D0%BA%D0%B0" title="Шаблон:Класическа електродинамика"><abbr title="Преглед на шаблона">п</abbr></a></li><li class="nv-talk"><a class="external text" href="https://bg.wikipedia.org/w/index.php?title=%D0%A8%D0%B0%D0%B1%D0%BB%D0%BE%D0%BD_%D0%B1%D0%B5%D1%81%D0%B5%D0%B4%D0%B0%3A%D0%9A%D0%BB%D0%B0%D1%81%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0_%D0%B5%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%B4%D0%B8%D0%BD%D0%B0%D0%BC%D0%B8%D0%BA%D0%B0&action=edit&redlink=1"><abbr title="Беседа на шаблона (страницата не съществува)" style="color:#ba0000">б</abbr></a></li><li class="nv-edit"><a class="external text" href="https://bg.wikipedia.org/w/index.php?title=%D0%A8%D0%B0%D0%B1%D0%BB%D0%BE%D0%BD:%D0%9A%D0%BB%D0%B0%D1%81%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0_%D0%B5%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%B4%D0%B8%D0%BD%D0%B0%D0%BC%D0%B8%D0%BA%D0%B0&action=edit"><abbr title="Редактиране на шаблона">р</abbr></a></li></ul></div></td></tr></tbody></table> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Magnetar_magnetic_field.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/46/Magnetar_magnetic_field.png/220px-Magnetar_magnetic_field.png" decoding="async" width="220" height="161" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/46/Magnetar_magnetic_field.png/330px-Magnetar_magnetic_field.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/46/Magnetar_magnetic_field.png/440px-Magnetar_magnetic_field.png 2x" data-file-width="826" data-file-height="604" /></a><figcaption></figcaption></figure> <p><b>Магнитната индукция</b> е <a href="/wiki/%D0%92%D0%B5%D0%BA%D1%82%D0%BE%D1%80" title="Вектор">векторна величина</a>, която характеризира <a href="/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%BE_%D0%BF%D0%BE%D0%BB%D0%B5" title="Магнитно поле">магнитното поле</a> във всяка точка от пространството. </p><p>За да се изследва магнитното поле, в него се поставя <b>пробна рамка</b>. Това е плосък проводников контур, по който тече <a href="/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8_%D1%82%D0%BE%D0%BA" title="Електрически ток">ток</a>, с много малки размери в сравнение с разстоянието от тока, създаващ магнитното поле, до точката, в която се изследва това магнитно поле. </p><p>Величината, която характеризира пробната рамка, се нарича <a href="/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%B5%D0%BD_%D0%BC%D0%BE%D0%BC%D0%B5%D0%BD%D1%82" title="Магнитен момент">магнитен момент</a> и се дефинира с уравнението: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\vec {p}}_{m}=I{\vec {S}}=IS{\vec {n}}\,,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mi>p</mi> <mo stretchy="false">→</mo> </mover> </mrow> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi>m</mi> </mrow> </msub> <mo>=</mo> <mi>I</mi> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mi>S</mi> <mo stretchy="false">→</mo> </mover> </mrow> </mrow> <mo>=</mo> <mi>I</mi> <mi>S</mi> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mi>n</mi> <mo stretchy="false">→</mo> </mover> </mrow> </mrow> <mspace width="thinmathspace" /> <mo>,</mo> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\vec {p}}_{m}=I{\vec {S}}=IS{\vec {n}}\,,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/63e92a78073f1649f88f3f04a740b054979417d1" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; margin-left: -0.089ex; width:17.096ex; height:3.509ex;" alt="{\displaystyle {\vec {p}}_{m}=I{\vec {S}}=IS{\vec {n}}\,,}"></span></dd></dl> <p>където <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle I}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>I</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle I}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/535ea7fc4134a31cbe2251d9d3511374bc41be9f" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.172ex; height:2.176ex;" alt="{\displaystyle I}"></span> е големината на тока, протичащ по рамката, <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle S}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>S</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle S}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/4611d85173cd3b508e67077d4a1252c9c05abca2" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.499ex; height:2.176ex;" alt="{\displaystyle S}"></span> е площта на рамката, а <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\vec {n}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mi>n</mi> <mo stretchy="false">→</mo> </mover> </mrow> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\vec {n}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/49569db585c1b6306d5ffd91161775f67235fae0" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.395ex; height:2.343ex;" alt="{\displaystyle {\vec {n}}}"></span> е нормалата към площта на рамката. </p><p>Когато пробна рамка бъде поставена в магнитно поле, се наблюдава завъртане на рамката в определена посока, докато магнитният ѝ момент <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\vec {p}}_{m}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mi>p</mi> <mo stretchy="false">→</mo> </mover> </mrow> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi>m</mi> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\vec {p}}_{m}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/57ea6240dbddb1b65855d93459a5e6d989691af6" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; margin-left: -0.089ex; width:3.09ex; height:2.843ex;" alt="{\displaystyle {\vec {p}}_{m}}"></span> се насочи по посока на магнитното поле. Ако се промени посоката на тока <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle I}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>I</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle I}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/535ea7fc4134a31cbe2251d9d3511374bc41be9f" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.172ex; height:2.176ex;" alt="{\displaystyle I}"></span> в рамката, тя се завърта в обратна посока. </p><p>Следователно магнитното поле се характеризира със сили, които създават <a href="/wiki/%D0%9C%D0%BE%D0%BC%D0%B5%D0%BD%D1%82_%D0%BD%D0%B0_%D1%81%D0%B8%D0%BB%D0%B0" title="Момент на сила">въртящ момент</a> <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\vec {M}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mi>M</mi> <mo stretchy="false">→</mo> </mover> </mrow> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\vec {M}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/b903a0e453efca49cfda6ba33edb465de21a6b1d" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.442ex; height:2.843ex;" alt="{\displaystyle {\vec {M}}}"></span>, който действа на пробната рамка. Опитно е установено, че <i>въртящият момент е максимален, когато векторът <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\vec {p}}_{m}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mi>p</mi> <mo stretchy="false">→</mo> </mover> </mrow> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi>m</mi> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\vec {p}}_{m}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/57ea6240dbddb1b65855d93459a5e6d989691af6" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; margin-left: -0.089ex; width:3.09ex; height:2.843ex;" alt="{\displaystyle {\vec {p}}_{m}}"></span> на рамката е перпендикулярен на посоката на магнитното поле.</i> </p><p>Експериментално е установено също, че ако в дадена точка на изследваното магнитно поле, създадено от тока <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle I_{0}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>I</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle I_{0}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/893d08e90ea73781dc133414d661529d0651ca80" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:2.077ex; height:2.509ex;" alt="{\displaystyle I_{0}}"></span>, се поставят различни пробни рамки с различни магнитни моменти, действащите им максимални въртящи моменти ще бъдат различни: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle p_{m_{1}}\rightarrow M_{1}^{\max }}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <msub> <mi>m</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>1</mn> </mrow> </msub> </mrow> </msub> <mo stretchy="false">→</mo> <msubsup> <mi>M</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>1</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mo movablelimits="true" form="prefix">max</mo> </mrow> </msubsup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle p_{m_{1}}\rightarrow M_{1}^{\max }}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/7af0181090389815817f8cd3852b9a9aecf8275c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; margin-left: -0.089ex; width:13.169ex; height:2.843ex;" alt="{\displaystyle p_{m_{1}}\rightarrow M_{1}^{\max }}"></span></dd></dl> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle p_{m_{2}}\rightarrow M_{2}^{\max }}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <msub> <mi>m</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msub> </mrow> </msub> <mo stretchy="false">→</mo> <msubsup> <mi>M</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mo movablelimits="true" form="prefix">max</mo> </mrow> </msubsup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle p_{m_{2}}\rightarrow M_{2}^{\max }}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/5f747d502f41df9917eecbdc4874ac2470ba36eb" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; margin-left: -0.089ex; width:13.169ex; height:2.843ex;" alt="{\displaystyle p_{m_{2}}\rightarrow M_{2}^{\max }}"></span></dd></dl> <dl><dd>...,</dd></dl> <p>но отношението <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\frac {M^{\max }}{p_{m}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <msup> <mi>M</mi> <mrow class="MJX-TeXAtom-ORD"> <mo movablelimits="true" form="prefix">max</mo> </mrow> </msup> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>m</mi> </mrow> </msub> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\frac {M^{\max }}{p_{m}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/e4e46e3431378897ad19141a2709c0b1e9eeb732" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:6.626ex; height:5.676ex;" alt="{\displaystyle {\frac {M^{\max }}{p_{m}}}}"></span> ще бъде едно и също за всички пробни рамки, т.е. <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\frac {M_{1}^{\max }}{p_{m_{1}}}}={\frac {M_{2}^{\max }}{p_{m_{2}}}}=const.}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <msubsup> <mi>M</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>1</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mo movablelimits="true" form="prefix">max</mo> </mrow> </msubsup> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <msub> <mi>m</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>1</mn> </mrow> </msub> </mrow> </msub> </mfrac> </mrow> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <msubsup> <mi>M</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mo movablelimits="true" form="prefix">max</mo> </mrow> </msubsup> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <msub> <mi>m</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msub> </mrow> </msub> </mfrac> </mrow> <mo>=</mo> <mi>c</mi> <mi>o</mi> <mi>n</mi> <mi>s</mi> <mi>t</mi> <mo>.</mo> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\frac {M_{1}^{\max }}{p_{m_{1}}}}={\frac {M_{2}^{\max }}{p_{m_{2}}}}=const.}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/25c5f5f58020ec120f76f0f895d055a1195c70fd" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.505ex; width:25.555ex; height:6.343ex;" alt="{\displaystyle {\frac {M_{1}^{\max }}{p_{m_{1}}}}={\frac {M_{2}^{\max }}{p_{m_{2}}}}=const.}"></span> Следователно това отношение не зависи от пробната рамка и е характеристика само на магнитното поле. Така се въвежда физичната величина <b>магнитна индукция</b> или <b>индукция на магнитното поле</b> <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\vec {B}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mi>B</mi> <mo stretchy="false">→</mo> </mover> </mrow> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\vec {B}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/83ae7d80cab55b606de217162280b2279142bbb4" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.764ex; height:2.843ex;" alt="{\displaystyle {\vec {B}}}"></span>, която характеризира магнитното поле във всяка точка на пространството. </p><p>Големината на магнитната индукция <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle B}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>B</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle B}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/47136aad860d145f75f3eed3022df827cee94d7a" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.764ex; height:2.176ex;" alt="{\displaystyle B}"></span> се дефинира като максималният въртящ момент, действащ на пробна рамка с единичен магнитен момент: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle B={\frac {M^{\max }}{p_{m}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>B</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <msup> <mi>M</mi> <mrow class="MJX-TeXAtom-ORD"> <mo movablelimits="true" form="prefix">max</mo> </mrow> </msup> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>m</mi> </mrow> </msub> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle B={\frac {M^{\max }}{p_{m}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/3f5a555bf59a0c307118b82d95d6a4817c3001f3" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:11.488ex; height:5.676ex;" alt="{\displaystyle B={\frac {M^{\max }}{p_{m}}}}"></span></dd></dl> <p><b>Посоката на магнитното поле</b> съвпада с посоката, която сочи северния полюс на магнитната стрелка. Това е посоката и на магнитната индукция. </p><p>Векторът на магнитната индукция <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\vec {B}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mi>B</mi> <mo stretchy="false">→</mo> </mover> </mrow> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\vec {B}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/83ae7d80cab55b606de217162280b2279142bbb4" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.764ex; height:2.843ex;" alt="{\displaystyle {\vec {B}}}"></span> е свързан с въртящия момент по следния начин: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\vec {M}}={\vec {p}}_{m}\times {\vec {B}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mi>M</mi> <mo stretchy="false">→</mo> </mover> </mrow> </mrow> <mo>=</mo> <msub> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mi>p</mi> <mo stretchy="false">→</mo> </mover> </mrow> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi>m</mi> </mrow> </msub> <mo>×</mo> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mi>B</mi> <mo stretchy="false">→</mo> </mover> </mrow> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\vec {M}}={\vec {p}}_{m}\times {\vec {B}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/2e165362b91c7acef114f20e15d670df843d006c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:13.145ex; height:3.343ex;" alt="{\displaystyle {\vec {M}}={\vec {p}}_{m}\times {\vec {B}}}"></span> или <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle M=p_{m}B\sin \alpha \,.}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>M</mi> <mo>=</mo> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>m</mi> </mrow> </msub> <mi>B</mi> <mi>sin</mi> <mo>⁡</mo> <mi>α</mi> <mspace width="thinmathspace" /> <mo>.</mo> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle M=p_{m}B\sin \alpha \,.}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/b87537c9da75d9c4536cf64f393fa549c76e84f8" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:16.301ex; height:2.509ex;" alt="{\displaystyle M=p_{m}B\sin \alpha \,.}"></span></dd></dl> <p>Мерната единица за магнитна индукция е <a href="/wiki/%D0%A2%D0%B5%D1%81%D0%BB%D0%B0" class="mw-redirect" title="Тесла">тесла</a>: <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>T</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/ec7200acd984a1d3a3d7dc455e262fbe54f7f6e0" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.636ex; height:2.176ex;" alt="{\displaystyle T}"></span>. Индукцията на магнитното поле е една тесла, когато то действа с магнитна сила един нютон (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle N}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>N</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle N}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f5e3890c981ae85503089652feb48b191b57aae3" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.064ex; height:2.176ex;" alt="{\displaystyle N}"></span>) върху проводник с дължина един метър (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle m}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>m</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle m}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/0a07d98bb302f3856cbabc47b2b9016692e3f7bc" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.04ex; height:1.676ex;" alt="{\displaystyle m}"></span>), по който тече ток един ампер (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle A}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>A</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle A}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/7daff47fa58cdfd29dc333def748ff5fa4c923e3" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.743ex; height:2.176ex;" alt="{\displaystyle A}"></span>): </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle 1T={\frac {1N}{A.m}}\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mn>1</mn> <mi>T</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <mn>1</mn> <mi>N</mi> </mrow> <mrow> <mi>A</mi> <mo>.</mo> <mi>m</mi> </mrow> </mfrac> </mrow> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle 1T={\frac {1N}{A.m}}\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/40a9fe70df49b1942f8e8fe77f3562652741a067" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.005ex; width:11.938ex; height:5.343ex;" alt="{\displaystyle 1T={\frac {1N}{A.m}}\,}"></span>.</dd></dl> <p>Магнитната индукция в дадена точка от полето зависи от формата на проводника, по който тече токът, източник на полето. Друго нейно свойство е, че намалява с увеличаване на разстоянието от източника и е правопропорционална на тока, който създава полето. При прав проводник, по който тече ток със сила <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle I}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>I</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle I}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/535ea7fc4134a31cbe2251d9d3511374bc41be9f" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.172ex; height:2.176ex;" alt="{\displaystyle I}"></span>, големината на магнитната индукция на разстояние <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle r}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>r</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle r}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/0d1ecb613aa2984f0576f70f86650b7c2a132538" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.049ex; height:1.676ex;" alt="{\displaystyle r}"></span> e: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle B={\frac {\mu _{0}I}{2\pi r}}\,,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>B</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <msub> <mi>μ</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> </msub> <mi>I</mi> </mrow> <mrow> <mn>2</mn> <mi>π</mi> <mi>r</mi> </mrow> </mfrac> </mrow> <mspace width="thinmathspace" /> <mo>,</mo> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle B={\frac {\mu _{0}I}{2\pi r}}\,,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/2e19cff3872636c968255de202581aee6ce2a3d2" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.838ex; width:10.36ex; height:5.343ex;" alt="{\displaystyle B={\frac {\mu _{0}I}{2\pi r}}\,,}"></span></dd></dl> <p>където <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \mu _{0}=4\pi .10^{-7}H/m}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>μ</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> </msub> <mo>=</mo> <mn>4</mn> <mi>π</mi> <msup> <mn>.10</mn> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mn>7</mn> </mrow> </msup> <mi>H</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>/</mo> </mrow> <mi>m</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \mu _{0}=4\pi .10^{-7}H/m}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/eca498417c13f4874b104427bd85c30e9d637aa4" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:18.62ex; height:3.176ex;" alt="{\displaystyle \mu _{0}=4\pi .10^{-7}H/m}"></span> е магнитната проницаемост на вакуума. </p><p>Посоката на магнитната индукция можем да открием чрез правилото на дясната ръка (ако палецът сочи посоката на тока, а магнитната сила излиза перпендикулярно от дланта, опънатите пръсти сочат посоката на магнитната индукция). Представа за посоката на магнитната индукция получаваме от магнитните индукционни линии – ориентирани по посока на полето мислени линии, чиито допирателни във всяка точка съвпадат с направлението на магнитната индукция. Ориентация по полето означава, че за един постоянен магнит тези линии излизат от северния и влизат в южния му полюс. Магнитните индукционни линии са затворени линии или идват от безкрайността и се втичат пак в безкрайността. Това е свързано с факта, че в природата не съществуват магнитни заряди, аналогични на електричните заряди. Поле със затворени силови линии се нарича вихрово поле. Следователно магнитното поле е вихрово поле. </p>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1&useformat=desktop" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Взето от „<a dir="ltr" href="https://bg.wikipedia.org/w/index.php?title=Магнитна_индукция&oldid=11673190">https://bg.wikipedia.org/w/index.php?title=Магнитна_индукция&oldid=11673190</a>“.</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D0%B8" title="Специални:Категории">Категория</a>: <ul><li><a href="/wiki/%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%BC%D0%B0%D0%B3%D0%BD%D0%B5%D1%82%D0%B8%D0%B7%D1%8A%D0%BC" title="Категория:Електромагнетизъм">Електромагнетизъм</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Скрита категория: <ul><li><a href="/wiki/%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%A1%D1%82%D0%B0%D1%82%D0%B8%D0%B8_%D0%B1%D0%B5%D0%B7_%D0%BF%D0%BE%D1%81%D0%BE%D1%87%D0%B5%D0%BD%D0%B8_%D0%B8%D0%B7%D1%82%D0%BE%D1%87%D0%BD%D0%B8%D1%86%D0%B8" title="Категория:Статии без посочени източници">Статии без посочени източници</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Последната промяна на страницата е извършена на 4 февруари 2023 г. в 17:18 ч.</li> <li id="footer-info-copyright">Текстът е достъпен под лиценза <a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.bg">Creative Commons Признание-Споделяне на споделеното</a>; може да са приложени допълнителни условия. 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