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class="vector-toc-numb">1</span> <span>Definition</span> </div> </a> <ul id="toc-Definition-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ground_voltage" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Ground_voltage"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Ground voltage</span> </div> </a> <ul id="toc-Ground_voltage-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Measuring_tools" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Measuring_tools"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Measuring tools</span> </div> </a> <ul id="toc-Measuring_tools-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Potential_difference" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Potential_difference"> <div 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Available in 100 languages" > <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-100" 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">100 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Elektriese_spanning" title="Elektriese spanning – Afrikaans" lang="af" hreflang="af" data-title="Elektriese spanning" data-language-autonym="Afrikaans" data-language-local-name="Afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AC%D9%87%D8%AF_%D9%83%D9%87%D8%B1%D8%A8%D8%A7%D8%A6%D9%8A" title="جهد كهربائي – Arabic" lang="ar" hreflang="ar" data-title="جهد كهربائي" data-language-autonym="العربية" data-language-local-name="Arabic" 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/G%C9%99rginlik_(elektrik)" title="Gərginlik (elektrik) – Azerbaijani" lang="az" hreflang="az" data-title="Gərginlik (elektrik)" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbaijani" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D9%88%D9%88%D9%84%D8%AA%D8%A7%DA%98" title="وولتاژ – South Azerbaijani" lang="azb" hreflang="azb" data-title="وولتاژ" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AC%E0%A6%BF%E0%A6%AD%E0%A6%AC" title="বিভব – Bangla" lang="bn" hreflang="bn" data-title="বিভব" data-language-autonym="বাংলা" data-language-local-name="Bangla" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Ti%C4%81n-ap" title="Tiān-ap – Minnan" lang="nan" hreflang="nan" data-title="Tiān-ap" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%AD%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D1%8B%D1%87%D0%BD%D0%B0%D0%B5_%D0%BD%D0%B0%D0%BF%D1%80%D1%83%D0%B6%D0%B0%D0%BD%D0%BD%D0%B5" title="Электрычнае напружанне – Belarusian" lang="be" hreflang="be" data-title="Электрычнае напружанне" data-language-autonym="Беларуская" data-language-local-name="Belarusian" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%9D%D0%B0%D0%BF%D1%80%D1%83%D0%B3%D0%B0" title="Напруга – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Напруга" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/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 – Bulgarian" lang="bg" hreflang="bg" data-title="Електрическо напрежение" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bar mw-list-item"><a href="https://bar.wikipedia.org/wiki/Elektrische_Spaunnung" title="Elektrische Spaunnung – Bavarian" lang="bar" hreflang="bar" data-title="Elektrische Spaunnung" data-language-autonym="Boarisch" data-language-local-name="Bavarian" class="interlanguage-link-target"><span>Boarisch</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Elektri%C4%8Dni_napon" title="Električni napon – Bosnian" lang="bs" hreflang="bs" data-title="Električni napon" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Difer%C3%A8ncia_de_potencial" title="Diferència de potencial – Catalan" lang="ca" hreflang="ca" data-title="Diferència de potencial" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%AD%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE_%D1%85%D0%B8%D0%B2%D1%80%D0%B5%D0%BB%C4%95%D1%85" title="Электро хиврелĕх – Chuvash" lang="cv" hreflang="cv" data-title="Электро хиврелĕх" data-language-autonym="Чӑвашла" data-language-local-name="Chuvash" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-ceb mw-list-item"><a href="https://ceb.wikipedia.org/wiki/Boltahe" title="Boltahe – Cebuano" lang="ceb" hreflang="ceb" data-title="Boltahe" data-language-autonym="Cebuano" data-language-local-name="Cebuano" class="interlanguage-link-target"><span>Cebuano</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Elektrick%C3%A9_nap%C4%9Bt%C3%AD" title="Elektrické napětí – Czech" lang="cs" hreflang="cs" data-title="Elektrické napětí" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Foltedd" title="Foltedd – Welsh" lang="cy" hreflang="cy" data-title="Foltedd" data-language-autonym="Cymraeg" data-language-local-name="Welsh" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Elektrisk_sp%C3%A6nding" title="Elektrisk spænding – Danish" lang="da" hreflang="da" data-title="Elektrisk spænding" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Elektrische_Spannung" title="Elektrische Spannung – German" lang="de" hreflang="de" data-title="Elektrische Spannung" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Pinge_(elekter)" title="Pinge (elekter) – Estonian" lang="et" hreflang="et" data-title="Pinge (elekter)" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%94%CE%B9%CE%B1%CF%86%CE%BF%CF%81%CE%AC_%CE%B4%CF%85%CE%BD%CE%B1%CE%BC%CE%B9%CE%BA%CE%BF%CF%8D" title="Διαφορά δυναμικού – Greek" lang="el" hreflang="el" data-title="Διαφορά δυναμικού" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Voltage" title="Voltage – English" lang="en" hreflang="en" data-title="Voltage" data-language-autonym="English" data-language-local-name="English" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Tensi%C3%B3n_(electricidad)" title="Tensión (electricidad) – Spanish" lang="es" hreflang="es" data-title="Tensión (electricidad)" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Elektra_tensio" title="Elektra tensio – Esperanto" lang="eo" hreflang="eo" data-title="Elektra tensio" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-ext mw-list-item"><a href="https://ext.wikipedia.org/wiki/Tensi%C3%B3n" title="Tensión – Extremaduran" lang="ext" hreflang="ext" data-title="Tensión" data-language-autonym="Estremeñu" data-language-local-name="Extremaduran" class="interlanguage-link-target"><span>Estremeñu</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Tentsio_(elektrizitatea)" title="Tentsio (elektrizitatea) – Basque" lang="eu" hreflang="eu" data-title="Tentsio (elektrizitatea)" data-language-autonym="Euskara" data-language-local-name="Basque" 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/%D9%88%D9%84%D8%AA%D8%A7%DA%98" title="ولتاژ – Persian" lang="fa" hreflang="fa" data-title="ولتاژ" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Tension_%C3%A9lectrique" title="Tension électrique – French" lang="fr" hreflang="fr" data-title="Tension électrique" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Difr%C3%ADocht_poit%C3%A9insil" title="Difríocht poitéinsil – Irish" lang="ga" hreflang="ga" data-title="Difríocht poitéinsil" data-language-autonym="Gaeilge" data-language-local-name="Irish" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Tensi%C3%B3n_el%C3%A9ctrica" title="Tensión eléctrica – Galician" lang="gl" hreflang="gl" data-title="Tensión eléctrica" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%A0%84%EC%95%95" title="전압 – Korean" lang="ko" hreflang="ko" data-title="전압" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%B7%D5%AC%D5%A5%D5%AF%D5%BF%D6%80%D5%A1%D5%AF%D5%A1%D5%B6_%D5%AC%D5%A1%D6%80%D5%B8%D6%82%D5%B4" title="Էլեկտրական լարում – Armenian" lang="hy" hreflang="hy" data-title="Էլեկտրական լարում" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%B5%E0%A4%BF%E0%A4%AD%E0%A4%B5%E0%A4%BE%E0%A4%82%E0%A4%A4%E0%A4%B0" title="विभवांतर – Hindi" lang="hi" hreflang="hi" data-title="विभवांतर" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Napon" title="Napon – Croatian" lang="hr" hreflang="hr" data-title="Napon" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Tegangan_listrik" title="Tegangan listrik – Indonesian" lang="id" hreflang="id" data-title="Tegangan listrik" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Voltage" title="Voltage – Interlingua" lang="ia" hreflang="ia" data-title="Voltage" data-language-autonym="Interlingua" data-language-local-name="Interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-zu mw-list-item"><a href="https://zu.wikipedia.org/wiki/Ubuvuve" title="Ubuvuve – Zulu" lang="zu" hreflang="zu" data-title="Ubuvuve" data-language-autonym="IsiZulu" data-language-local-name="Zulu" class="interlanguage-link-target"><span>IsiZulu</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Rafspenna" title="Rafspenna – Icelandic" lang="is" hreflang="is" data-title="Rafspenna" data-language-autonym="Íslenska" data-language-local-name="Icelandic" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Tensione_elettrica" title="Tensione elettrica – Italian" lang="it" hreflang="it" data-title="Tensione elettrica" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%9E%D7%AA%D7%97_%D7%97%D7%A9%D7%9E%D7%9C%D7%99" title="מתח חשמלי – Hebrew" lang="he" hreflang="he" data-title="מתח חשמלי" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/Tegangan" title="Tegangan – Javanese" lang="jv" hreflang="jv" data-title="Tegangan" data-language-autonym="Jawa" data-language-local-name="Javanese" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%94%E1%83%9A%E1%83%94%E1%83%A5%E1%83%A2%E1%83%A0%E1%83%A3%E1%83%9A%E1%83%98_%E1%83%AB%E1%83%90%E1%83%91%E1%83%95%E1%83%90" title="ელექტრული ძაბვა – Georgian" lang="ka" hreflang="ka" data-title="ელექტრული ძაბვა" data-language-autonym="ქართული" data-language-local-name="Georgian" 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%9A%D0%B5%D1%80%D0%BD%D0%B5%D1%83" title="Кернеу – Kazakh" lang="kk" hreflang="kk" data-title="Кернеу" data-language-autonym="Қазақша" data-language-local-name="Kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Volteji" title="Volteji – Swahili" lang="sw" hreflang="sw" data-title="Volteji" data-language-autonym="Kiswahili" data-language-local-name="Swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%AD%D0%BB%D0%B5%D0%BA%D1%82%D1%80_%D1%87%D1%8B%D2%A3%D0%B0%D0%BB%D1%83%D1%83%D1%81%D1%83" title="Электр чыңалуусу – Kyrgyz" lang="ky" hreflang="ky" data-title="Электр чыңалуусу" data-language-autonym="Кыргызча" data-language-local-name="Kyrgyz" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Tensio_electrica" title="Tensio electrica – Latin" lang="la" hreflang="la" data-title="Tensio electrica" data-language-autonym="Latina" data-language-local-name="Latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Spriegums" title="Spriegums – Latvian" lang="lv" hreflang="lv" data-title="Spriegums" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Elektrin%C4%97_%C4%AFtampa" title="Elektrinė įtampa – Lithuanian" lang="lt" hreflang="lt" data-title="Elektrinė įtampa" data-language-autonym="Lietuvių" data-language-local-name="Lithuanian" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Tension_eletriga" title="Tension eletriga – Lombard" lang="lmo" hreflang="lmo" data-title="Tension eletriga" data-language-autonym="Lombard" data-language-local-name="Lombard" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Elektromos_fesz%C3%BClts%C3%A9g" title="Elektromos feszültség – Hungarian" lang="hu" hreflang="hu" data-title="Elektromos feszültség" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9D%D0%B0%D0%BF%D0%BE%D0%BD" title="Напон – Macedonian" lang="mk" hreflang="mk" data-title="Напон" data-language-autonym="Македонски" data-language-local-name="Macedonian" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-mg mw-list-item"><a href="https://mg.wikipedia.org/wiki/Herinaratra" title="Herinaratra – Malagasy" lang="mg" hreflang="mg" data-title="Herinaratra" data-language-autonym="Malagasy" data-language-local-name="Malagasy" class="interlanguage-link-target"><span>Malagasy</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%B5%E0%B5%8B%E0%B5%BE%E0%B4%9F%E0%B5%8D%E0%B4%9F%E0%B4%A4" title="വോൾട്ടത – Malayalam" lang="ml" hreflang="ml" data-title="വോൾട്ടത" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%B5%E0%A4%BF%E0%A4%AD%E0%A4%B5%E0%A4%BE%E0%A4%82%E0%A4%A4%E0%A4%B0" title="विभवांतर – Marathi" lang="mr" hreflang="mr" data-title="विभवांतर" data-language-autonym="मराठी" data-language-local-name="Marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Voltan" title="Voltan – Malay" lang="ms" hreflang="ms" data-title="Voltan" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%A5%D2%AF%D1%87%D0%B4%D1%8D%D0%BB" title="Хүчдэл – Mongolian" lang="mn" hreflang="mn" data-title="Хүчдэл" data-language-autonym="Монгол" data-language-local-name="Mongolian" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%97%E1%80%AD%E1%80%AF%E1%80%B7%E1%80%A1%E1%80%AC%E1%80%B8" title="ဗို့အား – Burmese" lang="my" hreflang="my" data-title="ဗို့အား" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="Burmese" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Elektrische_spanning" title="Elektrische spanning – Dutch" lang="nl" hreflang="nl" data-title="Elektrische spanning" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%AD%E0%A5%8B%E0%A4%B2%E0%A5%8D%E0%A4%9F%E0%A5%87%E0%A4%9C" title="भोल्टेज – Nepali" lang="ne" hreflang="ne" data-title="भोल्टेज" data-language-autonym="नेपाली" data-language-local-name="Nepali" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E9%9B%BB%E5%9C%A7" title="電圧 – Japanese" lang="ja" hreflang="ja" data-title="電圧" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/Elektrisk_sp%C3%A4%C3%A4nang" title="Elektrisk späänang – Northern Frisian" lang="frr" hreflang="frr" data-title="Elektrisk späänang" data-language-autonym="Nordfriisk" data-language-local-name="Northern Frisian" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-no badge-Q17437798 badge-goodarticle mw-list-item" title="good article badge"><a href="https://no.wikipedia.org/wiki/Elektrisk_spenning" title="Elektrisk spenning – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Elektrisk spenning" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Elektrisk_spenning" title="Elektrisk spenning – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Elektrisk spenning" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Tension_electrica" title="Tension electrica – Occitan" lang="oc" hreflang="oc" data-title="Tension electrica" data-language-autonym="Occitan" data-language-local-name="Occitan" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Elektr_kuchlanish" title="Elektr kuchlanish – Uzbek" lang="uz" hreflang="uz" data-title="Elektr kuchlanish" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%B5%E0%A9%8B%E0%A8%B2%E0%A8%9F%E0%A9%87%E0%A8%9C" title="ਵੋਲਟੇਜ – Punjabi" lang="pa" hreflang="pa" data-title="ਵੋਲਟੇਜ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="Punjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D9%88%D9%88%D9%84%D9%B9%DB%8C%D8%AC" title="وولٹیج – Western Punjabi" lang="pnb" hreflang="pnb" data-title="وولٹیج" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D9%88%D9%84%D9%BC%DB%90%D8%AC" title="ولټېج – Pashto" lang="ps" hreflang="ps" data-title="ولټېج" data-language-autonym="پښتو" data-language-local-name="Pashto" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Napi%C4%99cie_elektryczne" title="Napięcie elektryczne – Polish" lang="pl" hreflang="pl" data-title="Napięcie elektryczne" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Tens%C3%A3o_el%C3%A9trica" title="Tensão elétrica – Portuguese" lang="pt" hreflang="pt" data-title="Tensão elétrica" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Tensiune_electric%C4%83" title="Tensiune electrică – Romanian" lang="ro" hreflang="ro" data-title="Tensiune electrică" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/Pinchikilla_mast%27ay" title="Pinchikilla mast'ay – Quechua" lang="qu" hreflang="qu" data-title="Pinchikilla mast'ay" data-language-autonym="Runa Simi" data-language-local-name="Quechua" class="interlanguage-link-target"><span>Runa Simi</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%AD%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%BE%D0%B5_%D0%BD%D0%B0%D0%BF%D1%80%D1%8F%D0%B6%D0%B5%D0%BD%D0%B8%D0%B5" title="Электрическое напряжение – Russian" lang="ru" hreflang="ru" data-title="Электрическое напряжение" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Voltage" title="Voltage – Scots" lang="sco" hreflang="sco" data-title="Voltage" data-language-autonym="Scots" data-language-local-name="Scots" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Tensioni_elektrik" title="Tensioni elektrik – Albanian" lang="sq" hreflang="sq" data-title="Tensioni elektrik" data-language-autonym="Shqip" data-language-local-name="Albanian" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B7%80%E0%B7%9D%E0%B6%BD%E0%B7%8A%E0%B6%A7%E0%B7%93%E0%B6%BA%E0%B6%AD%E0%B7%8F%E0%B7%80" title="වෝල්ටීයතාව – Sinhala" lang="si" hreflang="si" data-title="වෝල්ටීයතාව" data-language-autonym="සිංහල" data-language-local-name="Sinhala" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Elektrick%C3%A9_nap%C3%A4tie" title="Elektrické napätie – Slovak" lang="sk" hreflang="sk" data-title="Elektrické napätie" data-language-autonym="Slovenčina" data-language-local-name="Slovak" 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/Elektri%C4%8Dna_napetost" title="Električna napetost – Slovenian" lang="sl" hreflang="sl" data-title="Električna napetost" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%DA%A4%DB%86%DA%B5%D8%AA%DB%8C%DB%95" title="ڤۆڵتیە – Central Kurdish" lang="ckb" hreflang="ckb" data-title="ڤۆڵتیە" data-language-autonym="کوردی" data-language-local-name="Central Kurdish" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%BD%D0%B8_%D0%BD%D0%B0%D0%BF%D0%BE%D0%BD" title="Електрични напон – Serbian" lang="sr" hreflang="sr" data-title="Електрични напон" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Elektri%C4%8Dni_napon" title="Električni napon – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Električni napon" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/Voltase" title="Voltase – Sundanese" lang="su" hreflang="su" data-title="Voltase" data-language-autonym="Sunda" data-language-local-name="Sundanese" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/J%C3%A4nnite" title="Jännite – Finnish" lang="fi" hreflang="fi" data-title="Jännite" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Elektrisk_sp%C3%A4nning" title="Elektrisk spänning – Swedish" lang="sv" hreflang="sv" data-title="Elektrisk spänning" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Boltahe" title="Boltahe – Tagalog" lang="tl" hreflang="tl" data-title="Boltahe" data-language-autonym="Tagalog" data-language-local-name="Tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%AE%E0%AE%BF%E0%AE%A9%E0%AF%8D%E0%AE%A9%E0%AE%B4%E0%AF%81%E0%AE%A4%E0%AF%8D%E0%AE%A4%E0%AE%AE%E0%AF%8D" title="மின்னழுத்தம் – Tamil" lang="ta" hreflang="ta" data-title="மின்னழுத்தம்" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%AD%D0%BB%D0%B5%D0%BA%D1%82%D1%80_%D0%BA%D3%A9%D1%87%D3%99%D0%BD%D0%B5%D1%88%D0%B5" title="Электр көчәнеше – Tatar" lang="tt" hreflang="tt" data-title="Электр көчәнеше" data-language-autonym="Татарча / tatarça" data-language-local-name="Tatar" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%B5%E0%B1%8B%E0%B0%B2%E0%B1%8D%E0%B0%9F%E0%B1%87%E0%B0%9C%E0%B1%8D" title="వోల్టేజ్ – Telugu" lang="te" hreflang="te" data-title="వోల్టేజ్" data-language-autonym="తెలుగు" data-language-local-name="Telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%81%E0%B8%A3%E0%B8%87%E0%B8%94%E0%B8%B1%E0%B8%99%E0%B9%84%E0%B8%9F%E0%B8%9F%E0%B9%89%E0%B8%B2" title="แรงดันไฟฟ้า – Thai" lang="th" hreflang="th" data-title="แรงดันไฟฟ้า" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Gerilim_(elektrik)" title="Gerilim (elektrik) – Turkish" lang="tr" hreflang="tr" data-title="Gerilim (elektrik)" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%BD%D0%B0_%D0%BD%D0%B0%D0%BF%D1%80%D1%83%D0%B3%D0%B0" title="Електрична напруга – Ukrainian" lang="uk" hreflang="uk" data-title="Електрична напруга" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D9%88%D9%88%D9%84%D9%B9%DB%8C%D8%AC" title="وولٹیج – Urdu" lang="ur" hreflang="ur" data-title="وولٹیج" data-language-autonym="اردو" data-language-local-name="Urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-ug mw-list-item"><a href="https://ug.wikipedia.org/wiki/%D8%AA%D9%88%D9%83_%D8%A8%DB%90%D8%B3%D9%89%D9%85%D9%89" title="توك بېسىمى – Uyghur" lang="ug" hreflang="ug" data-title="توك بېسىمى" data-language-autonym="ئۇيغۇرچە / Uyghurche" data-language-local-name="Uyghur" class="interlanguage-link-target"><span>ئۇيغۇرچە / Uyghurche</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Hi%E1%BB%87u_%C4%91i%E1%BB%87n_th%E1%BA%BF" title="Hiệu điện thế – Vietnamese" lang="vi" hreflang="vi" data-title="Hiệu điện thế" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh-classical mw-list-item"><a href="https://zh-classical.wikipedia.org/wiki/%E9%9B%BB%E5%A3%93" title="電壓 – Literary Chinese" lang="lzh" hreflang="lzh" data-title="電壓" data-language-autonym="文言" data-language-local-name="Literary Chinese" class="interlanguage-link-target"><span>文言</span></a></li><li class="interlanguage-link interwiki-wo mw-list-item"><a href="https://wo.wikipedia.org/wiki/Dendu_mb%C3%ABj" title="Dendu mbëj – Wolof" lang="wo" hreflang="wo" data-title="Dendu mbëj" data-language-autonym="Wolof" data-language-local-name="Wolof" class="interlanguage-link-target"><span>Wolof</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E7%94%B5%E5%8E%8B" title="电压 – Wu" lang="wuu" hreflang="wuu" data-title="电压" data-language-autonym="吴语" data-language-local-name="Wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/%D7%95%D7%95%D7%90%D7%9C%D7%98%D7%90%D7%96%D7%A9" title="וואלטאזש – Yiddish" lang="yi" hreflang="yi" data-title="וואלטאזש" data-language-autonym="ייִדיש" data-language-local-name="Yiddish" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E9%9B%BB%E5%A3%93" title="電壓 – Cantonese" lang="yue" hreflang="yue" data-title="電壓" data-language-autonym="粵語" data-language-local-name="Cantonese" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E9%9B%BB%E5%A3%93" title="電壓 – Chinese" lang="zh" hreflang="zh" data-title="電壓" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-bew mw-list-item"><a href="https://bew.wikipedia.org/wiki/Spaneng" title="Spaneng – Betawi" lang="bew" hreflang="bew" data-title="Spaneng" data-language-autonym="Betawi" data-language-local-name="Betawi" class="interlanguage-link-target"><span>Betawi</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/Q25428#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Change links</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="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul 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src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1f/9VBatteryWithMeter.jpg/220px-9VBatteryWithMeter.jpg" decoding="async" width="220" height="183" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1f/9VBatteryWithMeter.jpg/330px-9VBatteryWithMeter.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1f/9VBatteryWithMeter.jpg/440px-9VBatteryWithMeter.jpg 2x" data-file-width="589" data-file-height="489" /></a><figcaption>Voltage measure device with battery</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:AAAA_AAA_AA_9V_comparison-1.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/22/AAAA_AAA_AA_9V_comparison-1.jpg/220px-AAAA_AAA_AA_9V_comparison-1.jpg" decoding="async" width="220" height="153" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/22/AAAA_AAA_AA_9V_comparison-1.jpg/330px-AAAA_AAA_AA_9V_comparison-1.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/22/AAAA_AAA_AA_9V_comparison-1.jpg/440px-AAAA_AAA_AA_9V_comparison-1.jpg 2x" data-file-width="676" data-file-height="471" /></a><figcaption>Different battery types for low voltage source</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:20030230-01_Connecting_High_Voltage_Cable_-_Bonny_Nigeria.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e0/20030230-01_Connecting_High_Voltage_Cable_-_Bonny_Nigeria.jpg/220px-20030230-01_Connecting_High_Voltage_Cable_-_Bonny_Nigeria.jpg" decoding="async" width="220" height="151" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e0/20030230-01_Connecting_High_Voltage_Cable_-_Bonny_Nigeria.jpg/330px-20030230-01_Connecting_High_Voltage_Cable_-_Bonny_Nigeria.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e0/20030230-01_Connecting_High_Voltage_Cable_-_Bonny_Nigeria.jpg/440px-20030230-01_Connecting_High_Voltage_Cable_-_Bonny_Nigeria.jpg 2x" data-file-width="1189" data-file-height="815" /></a><figcaption>Connecting a high voltage cable</figcaption></figure> <p><b>Voltage</b> is what makes electric <a href="/wiki/Charged_particle" title="Charged particle">charges</a> move. It is the 'push' that causes charges to move in a wire or other <a href="/wiki/Electrical_conductor" title="Electrical conductor">electrical conductor</a>. It can be thought of as the force that pushes the charges, but it is not a <a href="/wiki/Force" title="Force">force</a>. Voltage can cause charges to move, and since moving charges is a current, voltage can cause a <a href="/wiki/Electric_current" title="Electric current">current</a>. </p><p>Electric Potential Difference is the true scientific term but is commonly called Voltage. Informally, voltage or electric potential difference is sometimes called "Potential Difference". Voltage is also called, in certain circumstances, electromotive force (EMF). </p><p>Voltage is an electrical potential difference, the difference in <a href="/wiki/Electric_potential" title="Electric potential">electric potential</a> between two places. The unit for electrical potential difference, or voltage, is the <a href="/wiki/Volt" title="Volt">volt</a>. The volt is named in memory of <a href="/wiki/Alessandro_Volta" title="Alessandro Volta">Alessandro Volta</a>. One volt equals one <a href="/wiki/Joule" title="Joule">joule</a> per <a href="/wiki/Coulomb" title="Coulomb">coulomb</a>. The <a href="/wiki/Symbol" title="Symbol">symbol</a> for the unit volt is written with an uppercase V as in (9V). According to the rules of the <a href="/wiki/International_System_of_Units" title="International System of Units">International System of Units</a>, the symbol for a unit with a name derived from the proper name of a person is uppercase. </p><p>Please note that the <b><a href="/wiki/Volt" title="Volt">volt</a></b> and <b>voltage</b> are two different things. The volt is a <a href="/wiki/Unit_of_measurement" title="Unit of measurement">unit</a> by which we measure something. Both electric potential and voltage are things we measure and the volt is the unit of measure for both. The <a href="/wiki/Symbol" title="Symbol">symbol</a> for the unit volt is written with a V (9 volts or 9 V). When voltage is used in a formula, it can be typeset in italics, e.g., <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 V=9\,{\text{V}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>V</mi> <mo>=</mo> <mn>9</mn> <mspace width="thinmathspace"></mspace> <mrow class="MJX-TeXAtom-ORD"> <mtext>V</mtext> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle V=9\,{\text{V}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/010f84d6c963f7c8fec9ddd1478f0b2aba5c8725" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:8.178ex; height:2.176ex;" alt="{\displaystyle V=9\,{\text{V}}}" /></span>, or written in cursive. If there is only a single letter symbol to go by, a lowercase v may be used, e.g., <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 {\text{voltage}}={\text{current}}\times {\text{resistance}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mtext>voltage</mtext> </mrow> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mtext>current</mtext> </mrow> <mo>×</mo> <mrow class="MJX-TeXAtom-ORD"> <mtext>resistance</mtext> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\text{voltage}}={\text{current}}\times {\text{resistance}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/760db6733fe23c296141bd882d3e64a16e4545e4" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:30.463ex; height:2.509ex;" alt="{\displaystyle {\text{voltage}}={\text{current}}\times {\text{resistance}}}" /></span> or <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 {\text{v}}={\text{ir}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mtext>v</mtext> </mrow> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mtext>ir</mtext> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\text{v}}={\text{ir}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/8f457e018b65c5036ba4ed747071fdae42765288" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:5.884ex; height:2.176ex;" alt="{\displaystyle {\text{v}}={\text{ir}}}" /></span>. Electrical engineers use the symbol <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 e}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>e</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle e}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/cd253103f0876afc68ebead27a5aa9867d927467" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.083ex; height:1.676ex;" alt="{\displaystyle e}" /></span> for voltage, e.g., <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 e=ir}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>e</mi> <mo>=</mo> <mi>i</mi> <mi>r</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle e=ir}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/3e81c59d384267dacd88860ddaf2c0b6823fc0be" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:6.033ex; height:2.176ex;" alt="{\displaystyle e=ir}" /></span>, to make the difference between voltage and volts very clear. </p><p>Technically, the voltage is the difference in <a href="/wiki/Electric_potential" title="Electric potential">electric potential</a> between two points and is always measured between two points. e.g. between the positive and negative ends of a battery, between a wire and the <a href="/w/index.php?title=Ground_(electricity)&action=edit&redlink=1" class="new" title="Ground (electricity) (not yet started)">ground</a>, or between a wire or a point of a circuit and a point in another part of the circuit. In everyday use with household <a href="/wiki/Electricity" title="Electricity">electricity</a> in the U.S. the voltage is most often 120V. This voltage is measured from the electric wire to the ground. </p><p>Note that there must be both voltage <i>and</i> current to transfer power (energy). For example, a wire can have a high voltage on it, but unless it is connected, nothing will happen. Birds can land on high voltage lines such as 12kV and 16kV without dying, because the current does not flow through the bird. </p><p>There are two types of voltage, <a href="/wiki/Direct_current" title="Direct current">DC</a> voltage and <a href="/wiki/Alternating_current" title="Alternating current">AC</a> voltage. The DC voltage (direct current voltage) always has the same polarity (positive or negative), such as in a battery. The AC voltage (alternating current voltage) alternates between positive and negative. For example, the voltage from the wall socket changes polarity 60 times per second (in America) or 50 times per second (UK and Europe). The DC is typically used for electronics and the AC for motors. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Definition">Definition</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Voltage&veaction=edit&section=1" title="Change section: Definition" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Voltage&action=edit&section=1" title="Edit section's source code: Definition"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Voltage is the change in Electric Potential between two places <br /> or the change in Electric <a href="/wiki/Potential_energy" title="Potential energy">Potential Energy</a> per coulomb between two places. </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 V=\Delta (EPE/q)=(EPE/q)_{2}-(EPE/q)_{1}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>V</mi> <mo>=</mo> <mi mathvariant="normal">Δ</mi> <mo stretchy="false">(</mo> <mi>E</mi> <mi>P</mi> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>/</mo> </mrow> <mi>q</mi> <mo stretchy="false">)</mo> <mo>=</mo> <mo stretchy="false">(</mo> <mi>E</mi> <mi>P</mi> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>/</mo> </mrow> <mi>q</mi> <msub> <mo stretchy="false">)</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msub> <mo>−</mo> <mo stretchy="false">(</mo> <mi>E</mi> <mi>P</mi> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>/</mo> </mrow> <mi>q</mi> <msub> <mo stretchy="false">)</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>1</mn> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle V=\Delta (EPE/q)=(EPE/q)_{2}-(EPE/q)_{1}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/569c80db42c095ca7b594c188c3b48ec566babe1" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:42.883ex; height:2.843ex;" alt="{\displaystyle V=\Delta (EPE/q)=(EPE/q)_{2}-(EPE/q)_{1}}" /></span></dd></dl> <p>Where <i>V</i>=Voltage, EPE=Electric Potential Energy, <i>q</i>=charge, ∆=difference in. </p> <div class="mw-heading mw-heading2"><h2 id="Ground_voltage">Ground voltage</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Voltage&veaction=edit&section=2" title="Change section: Ground voltage" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Voltage&action=edit&section=2" title="Edit section's source code: Ground voltage"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Voltage is always measured between two points, and one of them is often called the "ground", or the zero volt (0V) point. In most AC electrical installations there is a connection to the earth. A connection is made to the real ground through a water pipe, a ground rod buried or driven into the earth, or a convenient metallic conductor (not a gas pipe) buried underground. This connection is made at the point of entry of the electric system into a building, at every pole where there is a transformer at the street (often on an electric pole), and other places in the system. The whole planet Earth is used as a reference point for measuring voltage. In a building this ground is carried to each electrical device on two wires. One is the 'grounding conductor' (the green or bare wire) and is used as a safety ground to connect metal parts of equipment to the earth. The other is used as one of the electric conductors in the circuits of the system and is called the 'neutral conductor'. This wire which is at the ground potential completes all the circuits by carrying the current from any electric equipment back to the systems entry point into the buildings and then to the transformer usually at the street. In many places outside the buildings it becomes unnecessary to have a wire to complete the circuits and carry the current from the buildings to the generators. The return path that carries all the current back is the earth itself. </p><p>In DC circuits, the negative end of a generator or battery is often called the "ground" or zero volt (0V) point, even though there may or may not be a connection to the earth. There can be several grounds on the same printed circuit board (PCB), for example with sensitive analog circuits, that part of the circuit can use an "analog ground", and the digital part, have a " digital ground". </p><p>In electrical equipment the 0 volt point can be the metal chassis called a chassis ground or a connection to the actual ground called an earth ground, each with their own symbol used in electrical schematic drawings (circuit drawings). </p> <div class="mw-heading mw-heading2"><h2 id="Measuring_tools">Measuring tools</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Voltage&veaction=edit&section=3" title="Change section: Measuring tools" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Voltage&action=edit&section=3" title="Edit section's source code: Measuring tools"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Some of the tools for measuring the voltage are the <a href="/wiki/Voltmeter" title="Voltmeter">voltmeter</a> and the <a href="/wiki/Oscilloscope" title="Oscilloscope">oscilloscope</a>. </p><p>The voltmeter measures the voltage between two points and can be set to the DC mode or the AC mode. The voltmeter can measure the DC voltage of a battery for example (typically 1.5V or 9V), or the AC voltage from the power socket on the wall (typically 120V). </p><p>For more complex signals, an oscilloscope can be used the measured the DC and/or AC voltage, for example to measure the voltage across a speaker. </p> <div class="mw-heading mw-heading2"><h2 id="Potential_difference">Potential difference</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Voltage&veaction=edit&section=4" title="Change section: Potential difference" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Voltage&action=edit&section=4" title="Edit section's source code: Potential difference"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The voltage, or potential difference from point a to point b is the amount of energy in <a href="/wiki/Joules" class="mw-redirect" title="Joules">joules</a> (as a result of electric field) required to move 1 <a href="/wiki/Coulomb" title="Coulomb">coulomb</a> of positive charge from point a to point b. A negative voltage between points a and b is one in which 1 coulomb of energy is required to move a negative charge from point a to b. If there is a uniform <a href="/wiki/Electric_field" title="Electric field">electric field</a> about a charged object, negatively charged objects will be pulled towards higher voltages, and positively charged objects will be pulled towards lower voltages. The potential difference/Voltage between two points is independent of the path taken to get from point a to b. Thus, the voltage from a to b + the voltage from b to c will always equal the voltage from a to c. </p>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://simple.wikipedia.org/w/index.php?title=Voltage&oldid=10060457">https://simple.wikipedia.org/w/index.php?title=Voltage&oldid=10060457</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Special:Categories" title="Special:Categories">Categories</a>: <ul><li><a href="/wiki/Category:Energy" title="Category:Energy">Energy</a></li><li><a href="/wiki/Category:Electricity" title="Category:Electricity">Electricity</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"> This page was last changed on 6 February 2025, at 19:45.</li> <li id="footer-info-copyright">Text is available under the <a rel="nofollow" class="external text" href="//creativecommons.org/licenses/by-sa/4.0/">Creative Commons Attribution-ShareAlike License</a> and the <a href="/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License" title="Wikipedia:Text of the GNU Free Documentation License">GFDL</a>; additional terms may apply. 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