{"id":2111,"date":"2026-10-14T20:39:15","date_gmt":"2026-10-14T19:39:15","guid":{"rendered":"https:\/\/wpcalc.com\/pt\/fisica\/calculadora-lei-de-faraday\/"},"modified":"2026-10-14T20:39:15","modified_gmt":"2026-10-14T19:39:15","slug":"calculadora-lei-de-faraday","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/pt\/fisica\/calculadora-lei-de-faraday\/","title":{"rendered":"Calculadora da Lei de Faraday"},"content":{"rendered":"<section class=\"not-prose calculator-box\" aria-labelledby=\"calculator-title\"><div class=\"flex items-baseline sm:items-center justify-between gap-2 sm:gap-3\"><div class=\"flex flex-col sm:flex-row sm:items-center gap-2\"><span class=\"icon icon-calculator text-primary-700! text-base! dark:text-primary-300!\" aria-hidden=\"true\"><\/span><h2 id=\"calculator-title\" class=\"text-lg font-display font-bold\">Calcule a FEM induzida a partir da varia\u00e7\u00e3o do fluxo magn\u00e9tico<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"2111\" data-favorite-title=\"Lei de Faraday\" data-favorite-url=\"https:\/\/wpcalc.com\/pt\/fisica\/calculadora-lei-de-faraday\/\" data-favorite-excerpt=\"Calcule a FEM (tens\u00e3o) induzida a partir da varia\u00e7\u00e3o do fluxo magn\u00e9tico usando a lei de Faraday. Informe o n\u00famero de espiras da bobina, a varia\u00e7\u00e3o do fluxo \u0394\u03a6 e o intervalo de tempo \u0394t.\" aria-label=\"Adicionar aos favoritos\" data-favorite-icon=\"icon icon-physic\">\n    <span class=\"icon icon-shape-star-empty\" aria-hidden=\"true\"><\/span>\n  <\/button>\n  <div class=\"calcdash-favorite__tip\" aria-hidden=\"true\">\n   <span class=\"favorite-tooltip\" id=\"favorite-tooltip\"><\/span>\n  <\/div>\n  <span class=\"sr-only\" role=\"status\" id=\"favorite-status\"><\/span>\n<\/div><\/div><form action=\"https:\/\/wpcalc.com\/pt\/fisica\/calculadora-lei-de-faraday\/\" method=\"POST\" class=\"calculator\" id=\"calculator-2111\" data-post=\"2111\"><fieldset class=\"fieldset-input is-2\"><legend class=\"sr-only\">Campos de entrada<\/legend><div class=\"field has-term\" id=\"input-1\"><label for=\"field-1\">N\u00famero de espiras (N)<\/label><div class=\"term\">N<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><input type=\"text\" name=\"nmero_de_espiras_n\" id=\"field-1\" aria-describedby=\"calc-info-1\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"e.g. 100\" min=\"1\" value=\"100\"\/><small id=\"calc-info-1\">N\u00famero de espiras da bobina \u2014 normalmente \u00e9 um n\u00famero inteiro, mas valores decimais s\u00e3o aceitos<\/small><\/div><div class=\"field has-term\" id=\"input-2\"><label for=\"field-2\">Varia\u00e7\u00e3o do fluxo magn\u00e9tico (\u0394\u03a6)<\/label><div class=\"term\">\u0394\u03a6<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"variao_do_fluxo_magntico_\" id=\"field-2\" aria-describedby=\"calc-info-2\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"e.g. 5\" min=\"0\" value=\"5\"\/><div class=\"grid grid-cols-1\"><select id=\"field-3\" name=\"unidade_de_fluxo\" aria-label=\"Unidade de fluxo\"><option value=\"uwb\">\u00b5Wb<\/option><option value=\"mwb\" selected>mWb<\/option><option value=\"wb\">Wb<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-2\">Varia\u00e7\u00e3o absoluta do fluxo atrav\u00e9s da bobina: \u0394\u03a6 = |\u03a6\u2082 \u2212 \u03a6\u2081|<\/small><\/div><div class=\"field has-term\" id=\"input-3\"><label for=\"field-4\">Intervalo de tempo (\u0394t)<\/label><div class=\"term\">\u0394t<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"intervalo_de_tempo_t\" id=\"field-4\" aria-describedby=\"calc-info-4\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"e.g. 0.1\" min=\"0\" value=\"0.1\"\/><div class=\"grid grid-cols-1\"><select id=\"field-5\" name=\"unidade_de_tempo\" aria-label=\"Unidade de tempo\"><option value=\"ms\">ms<\/option><option value=\"s\" selected>s<\/option><option value=\"min\">min<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-4\">Tempo durante o qual ocorre a varia\u00e7\u00e3o do fluxo<\/small><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Recalcular\" id=\"calculate-button\" data-post=\"2111\">Calcular<\/button><button type=\"reset\">Redefinir<\/button><\/div><div class=\"field is-checkbox hidden!\" id=\"field-auto-calc\"><input type=\"checkbox\" id=\"auto-calc\"><label for=\"auto-calc\">Calcular automaticamente<\/label><small>Se ativado, o resultado \u00e9 atualizado automaticamente quando voc\u00ea altera qualquer valor.<\/small><\/div><div class=\"fieldset-result is-hidden\" aria-labelledby=\"result-title\" aria-live=\"polite\" role=\"region\"> <h3 class=\"result-title bg-gradient-to-r from-primary-50 to-gray-50 dark:from-primary-900 dark:to-gray-800\" id=\"result-title\"><span class=\"icon icon-s-pulse\" aria-hidden=\"true\"><\/span> Resultados da Lei de Faraday<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>FEM induzida<\/span><span class=\"result-term\">|\u03b5|<\/span><\/span><span class=\"field-value\" id=\"result-1\" data-unit=\"V\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-2\"><span class=\"field-title\"><span>Em milivolts<\/span><span class=\"result-term\">|\u03b5|<\/span><\/span><span class=\"field-value\" id=\"result-2\" data-unit=\"mV\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result is-column\" id=\"output-3\"><span class=\"field-title\"><span>Detalhes do c\u00e1lculo<\/span><\/span><span class=\"field-value\" id=\"result-3\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><\/div><div class=\"result-actions\"><button type=\"button\" class=\"copy-link\"><svg viewBox=\"0 0 20 20\" fill=\"currentColor\" aria-hidden=\"true\"><path d=\"M12.232 4.232a2.5 2.5 0 0 1 3.536 3.536l-1.225 1.224a.75.75 0 0 0 1.061 1.06l1.224-1.224a4 4 0 0 0-5.656-5.656l-3 3a4 4 0 0 0 .225 5.865.75.75 0 0 0 .977-1.138 2.5 2.5 0 0 1-.142-3.667l3-3Z\"\/><path d=\"M11.603 7.963a.75.75 0 0 0-.977 1.138 2.5 2.5 0 0 1 .142 3.667l-3 3a2.5 2.5 0 0 1-3.536-3.536l1.225-1.224a.75.75 0 0 0-1.061-1.06l-1.224 1.224a4 4 0 1 0 5.656 5.656l3-3a4 4 0 0 0-.225-5.865Z\"\/><\/svg><span class=\"copy-link__text\">Copiar link para este c\u00e1lculo<\/span><\/button><span class=\"sr-only\" role=\"status\" id=\"copy-link-status\"><\/span><\/div><\/div><a href=\"#respond\" class=\"hidden transition-opacity duration-300 opacity-0 w-50 text-sm justify-center items-center gap-2 px-4 py-2 rounded bg-gray-200 text-gray-700 hover:bg-gray-300\" id=\"leave-comment\"><span class=\"icon icon-comments\" aria-hidden=\"true\"><\/span>Deixar um coment\u00e1rio<\/a><\/form><\/section><section id=\"calc-reactions\" class=\"not-prose hidden my-12 bg-gradient-to-r from-primary-50 to-gray-50 border border-indigo-100 rounded-xl px-6 py-4 shadow-sm\" data-post=\"2111\" aria-live=\"polite\" aria-labelledby=\"calc-reactions-title\"><p id=\"calc-reactions-title\" class=\"text-sm text-gray-500 text-center mb-2\">O que voc\u00ea achou deste resultado?<\/p><div role=\"group\" aria-labelledby=\"calc-reactions-title\" class=\"grid grid-cols-3 sm:flex sm:flex-row sm:justify-around gap-4 sm:items-center sm:flex-wrap\"><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"like\"><span class=\"reaction-count\" data-reaction-count=\"like\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude00 <\/span><span class=\"reaction-description font-medium\">Curti <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"helpful\"><span class=\"reaction-count\" data-reaction-count=\"helpful\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\udca1 <\/span><span class=\"reaction-description font-medium\">\u00datil <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"confused\"><span class=\"reaction-count\" data-reaction-count=\"confused\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude15 <\/span><span class=\"reaction-description font-medium\">Confuso <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"disappointed\"><span class=\"reaction-count\" data-reaction-count=\"disappointed\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude1e <\/span><span class=\"reaction-description font-medium\">Decepcionado <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"inaccurate\"><span class=\"reaction-count\" data-reaction-count=\"inaccurate\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\u274c <\/span><span class=\"reaction-description font-medium\">Impreciso <\/span><\/button><\/div><div id=\"reaction-message\" class=\"hidden mt-8 rounded-md border border-primary-100 bg-white\/50 backdrop-blur-sm px-4 py-2 text-sm text-center shadow-sm\"><\/div><\/section><div class=\"calcdash-ad not-prose calcdash-ad--calc_result calcdash-ad--in-article\"><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1721569815777345\" data-ad-slot=\"6317458308\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script><\/div>\n<style id=\"wpcoderpro-inline-1\">.formula-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section class=\"formula-box\" aria-labelledby=\"formula-title\">\r\n\t<div id=\"formula-title\" class=\"not-prose font-display mb-4\"><span class=\"icon icon-formula\" aria-hidden=\"true\"><\/span><h2>F\u00f3rmula da lei de Faraday<\/h2><\/div>\r\n\t<figure class=\"not-prose formula\">\r\n\t\t<figcaption class=\"formula-title\">F\u00f3rmula<\/figcaption>\r\n\t\t<div class=\"text-base text-gray-800\" id=\"formula\">\n\\[ \\varepsilon = -N \\frac{d\\Phi}{dt} \\qquad \\text{ou, para o m\u00f3dulo da FEM m\u00e9dia:} \\qquad |\\varepsilon| = N \\frac{\\Delta\\Phi}{\\Delta t} \\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Onde:<\/strong><\/p>\n<ul>\n<li>\\(\\varepsilon\\) \u2014 for\u00e7a eletromotriz induzida, FEM (volts, V)<\/li>\n<li>\\(N\\) \u2014 n\u00famero de espiras da bobina<\/li>\n<li>\\(\\Phi\\) \u2014 fluxo magn\u00e9tico atrav\u00e9s de uma espira da bobina (webers, Wb)<\/li>\n<li>\\(\\Delta\\Phi\\) \u2014 varia\u00e7\u00e3o do fluxo magn\u00e9tico, \\(\\Delta\\Phi = |\\Phi_2 - \\Phi_1|\\) (Wb)<\/li>\n<li>\\(\\Delta t\\) \u2014 intervalo de tempo em que o fluxo varia (segundos, s)<\/li>\n<\/ul>\n<p>A f\u00f3rmula diz que a FEM induzida em uma bobina \u00e9 proporcional \u00e0 rapidez com que o fluxo magn\u00e9tico atrav\u00e9s dela varia: mais espiras e uma varia\u00e7\u00e3o mais r\u00e1pida do fluxo geram uma tens\u00e3o maior. O sinal negativo \u00e9 a lei de Lenz \u2014 a FEM induzida sempre se op\u00f5e \u00e0 varia\u00e7\u00e3o do fluxo que a originou.<\/p>\n<p>\r\n<\/section>\n<style id=\"wpcoderpro-inline-2\">.calculation-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section id=\"calculation\" class=\"calculation-box\" aria-labelledby=\"calculation-title\">\r\n\t<div id=\"calculation-title\" class=\"not-prose font-display\"><span class=\"icon icon-unordered-list\" aria-hidden=\"true\"><\/span><h2>Lei de Faraday \u2013 Exemplo de c\u00e1lculo<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Exemplo:<\/strong> uma bobina de 100 espiras est\u00e1 imersa em um campo magn\u00e9tico. O fluxo atrav\u00e9s da bobina cai 5 mWb em um intervalo de 0,1 s (por exemplo, quando um \u00edm\u00e3 \u00e9 afastado da bobina). Qual FEM \u00e9 induzida?<\/p>\n<p>\\[ \\Delta\\Phi = 5\\ \\text{mWb} = 0{,}005\\ \\text{Wb}, \\qquad \\Delta t = 0{,}1\\ \\text{s} \\]<\/p>\n<p>\\[ |\\varepsilon| = N \\frac{\\Delta\\Phi}{\\Delta t} = 100 \\times \\frac{0{,}005}{0{,}1} \\]<\/p>\n<p><strong>Resultado:<\/strong> \\( |\\varepsilon| = 5\\ \\text{V} \\) (5.000 mV). Enquanto o fluxo est\u00e1 variando, a bobina desenvolve uma FEM induzida m\u00e9dia de 5 volts.<\/p>\n<p>\n\r\n<\/section>\n<h2>Como usar a calculadora da lei de Faraday<\/h2>\n<ol>\n<li>Informe o <strong>n\u00famero de espiras (N)<\/strong> da sua bobina. Normalmente \u00e9 um n\u00famero inteiro, por exemplo 100.<\/li>\n<li>Informe a <strong>varia\u00e7\u00e3o do fluxo magn\u00e9tico (\u0394\u03a6)<\/strong> \u2014 a diferen\u00e7a absoluta entre o fluxo final e o inicial, \\( |\\Phi_2 - \\Phi_1| \\). Escolha a unidade: \u00b5Wb, mWb ou Wb.<\/li>\n<li>Informe o <strong>intervalo de tempo (\u0394t)<\/strong> em que ocorre a varia\u00e7\u00e3o e selecione a unidade: ms, s ou min.<\/li>\n<li>Leia a <strong>FEM induzida<\/strong> em volts (V) e <strong>em milivolts<\/strong> (mV), junto com todos os detalhes do c\u00e1lculo.<\/li>\n<\/ol>\n<h2>O que \u00e9 a lei de indu\u00e7\u00e3o de Faraday?<\/h2>\n<p>A lei de indu\u00e7\u00e3o de Faraday, descoberta por Michael Faraday em 1831, \u00e9 um dos pilares do eletromagnetismo. Ela afirma que a varia\u00e7\u00e3o do fluxo magn\u00e9tico atrav\u00e9s de um circuito induz nesse circuito uma for\u00e7a eletromotriz \u2014 uma tens\u00e3o. Se o fluxo for constante, nenhuma tens\u00e3o aparece: algo precisa mudar. Essa mudan\u00e7a pode vir do movimento de um \u00edm\u00e3 em dire\u00e7\u00e3o a uma bobina ou afastando-se dela, do movimento da bobina dentro de um campo magn\u00e9tico, da varia\u00e7\u00e3o da intensidade do campo ao longo do tempo ou da rota\u00e7\u00e3o da bobina (que \u00e9 exatamente como funcionam os geradores).<\/p>\n<p>O fluxo magn\u00e9tico \\( \\Phi \\) mede quanto campo magn\u00e9tico atravessa uma superf\u00edcie. Ele vale \\( \\Phi = B A \\cos\\theta \\), onde \\( B \\) \u00e9 a densidade de fluxo magn\u00e9tico (em tesla), \\( A \\) \u00e9 a \u00e1rea da bobina e \\( \\theta \\) \u00e9 o \u00e2ngulo entre o campo e a normal \u00e0 superf\u00edcie. Sua unidade, o weber, satisfaz \\( 1\\ \\text{Wb} = 1\\ \\text{T}\\cdot\\text{m}^2 = 1\\ \\text{V}\\cdot\\text{s} \\).<\/p>\n<p>O resultado \\( |\\varepsilon| = N\\Delta\\Phi\/\\Delta t \\) \u00e9 a FEM <em>m\u00e9dia<\/em> no intervalo de tempo considerado. Se o fluxo varia a uma taxa constante, a FEM m\u00e9dia e a instant\u00e2nea coincidem. Se a varia\u00e7\u00e3o n\u00e3o \u00e9 uniforme (por exemplo, um fluxo senoidal em um gerador de corrente alternada), a FEM instant\u00e2nea em cada instante \u00e9 \\( N|d\\Phi\/dt| \\), que pode ser maior ou menor que a m\u00e9dia.<\/p>\n<p>O sinal negativo na lei completa expressa a <strong>lei de Lenz<\/strong>: a corrente induzida flui no sentido que se op\u00f5e \u00e0 varia\u00e7\u00e3o do fluxo. Por isso a FEM \u00e9 negativa quando o fluxo aumenta e positiva quando ele diminui. Esta calculadora devolve o m\u00f3dulo da FEM, que normalmente \u00e9 o que voc\u00ea precisa para resolver problemas \u2014 o sentido se deduz pela lei de Lenz assim que voc\u00ea souber se o fluxo est\u00e1 crescendo ou diminuindo.<\/p>\n<h2>Premissas, limita\u00e7\u00f5es e dicas pr\u00e1ticas<\/h2>\n<ul>\n<li><strong>Apenas FEM m\u00e9dia:<\/strong> a calculadora usa a forma de varia\u00e7\u00e3o finita \\( N\\Delta\\Phi\/\\Delta t \\). Para fluxos que variam rapidamente ou de forma n\u00e3o uniforme, trate o resultado como a m\u00e9dia no intervalo, e n\u00e3o como o valor instant\u00e2neo.<\/li>\n<li><strong>Fluxo uniforme na bobina:<\/strong> assume-se que cada espira concatena o mesmo fluxo \\( \\Phi \\). Em bobinas compactas e bem enroladas, essa \u00e9 uma aproxima\u00e7\u00e3o muito boa.<\/li>\n<li><strong>Autoindut\u00e2ncia ignorada:<\/strong> a calculadora determina a FEM a partir da varia\u00e7\u00e3o do fluxo externo. Em bobinas reais, a corrente induzida cria seu pr\u00f3prio fluxo (autoindut\u00e2ncia), o que altera ligeiramente a tens\u00e3o observada.<\/li>\n<li><strong>O que importa \u00e9 a varia\u00e7\u00e3o do fluxo:<\/strong> se \\( \\Delta\\Phi = 0 \\), nenhuma FEM \u00e9 induzida \u2014 uma bobina parada em um campo constante n\u00e3o produz nada, por mais intenso que seja o campo.<\/li>\n<li><strong>Confira as unidades:<\/strong> misturar unidades \u00e9 a fonte mais comum de erros. 1 mWb = 10<sup>\u22123<\/sup> Wb e 1 \u00b5Wb = 10<sup>\u22126<\/sup> Wb; 1 ms = 10<sup>\u22123<\/sup> s. A calculadora converte tudo para webers e segundos automaticamente.<\/li>\n<\/ul>\n<p>A lei de Faraday \u00e9 o princ\u00edpio de funcionamento de geradores el\u00e9tricos, transformadores, fog\u00f5es por indu\u00e7\u00e3o, carregadores sem fio e detectores de metais. Se voc\u00ea estiver explorando outras leis fundamentais da f\u00edsica, experimente nossa <a href=\"https:\/\/wpcalc.com\/pt\/fisica\/lei-de-hooke\/\">calculadora da Lei de Hooke<\/a> para for\u00e7as el\u00e1sticas, a <a href=\"https:\/\/wpcalc.com\/pt\/fisica\/campo-eletrico-carga-puntiforme\/\">calculadora de Campo el\u00e9trico de uma carga puntiforme<\/a> para eletrost\u00e1tica ou a <a href=\"https:\/\/wpcalc.com\/pt\/fisica\/calculadora-forca-gravitacional\/\">calculadora de For\u00e7a gravitacional<\/a> para a atra\u00e7\u00e3o newtoniana.<\/p>\n<h2>Refer\u00eancia r\u00e1pida: valores t\u00edpicos<\/h2>\n<table>\n<thead>\n<tr>\n<th>Situa\u00e7\u00e3o<\/th>\n<th>N<\/th>\n<th>\u0394\u03a6<\/th>\n<th>\u0394t<\/th>\n<th>FEM induzida<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u00cdm\u00e3 afastado de uma bobina pequena<\/td>\n<td>100<\/td>\n<td>1 mWb<\/td>\n<td>0,05 s<\/td>\n<td>2 V<\/td>\n<\/tr>\n<tr>\n<td>Bobina de gerador girando uma vez por ciclo<\/td>\n<td>500<\/td>\n<td>10 mWb<\/td>\n<td>0,02 s<\/td>\n<td>250 V<\/td>\n<\/tr>\n<tr>\n<td>Fluxo no n\u00facleo de transformador variando lentamente<\/td>\n<td>1.000<\/td>\n<td>2 mWb<\/td>\n<td>0,1 s<\/td>\n<td>20 V<\/td>\n<\/tr>\n<tr>\n<td>Pulso r\u00e1pido de fluxo em uma bobina sensora<\/td>\n<td>50<\/td>\n<td>0,2 mWb<\/td>\n<td>5 ms<\/td>\n<td>2 V<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>Calcule a FEM (tens\u00e3o) induzida a partir da varia\u00e7\u00e3o do fluxo magn\u00e9tico usando a lei de Faraday. Informe o n\u00famero de espiras da bobina, a varia\u00e7\u00e3o do fluxo \u0394\u03a6 e o intervalo de tempo \u0394t.<\/p>\n","protected":false},"author":3168,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10],"tags":[83],"class_list":["post-2111","post","type-post","status-publish","format-standard","hentry","category-fisica","tag-energia-trabalho"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2111","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/users\/3168"}],"replies":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/comments?post=2111"}],"version-history":[{"count":1,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2111\/revisions"}],"predecessor-version":[{"id":2608,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2111\/revisions\/2608"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/media?parent=2111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/categories?post=2111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/tags?post=2111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}