{"id":2035,"date":"2026-10-13T16:33:44","date_gmt":"2026-10-13T15:33:44","guid":{"rendered":"https:\/\/wpcalc.com\/pt\/engenharia\/reatancia-ca\/"},"modified":"2026-10-13T16:33:44","modified_gmt":"2026-10-13T15:33:44","slug":"reatancia-ca","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/pt\/engenharia\/reatancia-ca\/","title":{"rendered":"Reat\u00e2ncia em corrente alternada"},"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 oposi\u00e7\u00e3o de um capacitor ou de um indutor \u00e0 corrente alternada<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"2035\" data-favorite-title=\"Reat\u00e2ncia CA\" data-favorite-url=\"https:\/\/wpcalc.com\/pt\/engenharia\/reatancia-ca\/\" data-favorite-excerpt=\"Calcule a reat\u00e2ncia capacitiva (Xc) ou a reat\u00e2ncia indutiva (XL) de um componente em qualquer frequ\u00eancia de corrente alternada. Escolha o tipo de componente, informe a frequ\u00eancia e a capacit\u00e2ncia ou indut\u00e2ncia e obtenha a reat\u00e2ncia em ohms.\" aria-label=\"Adicionar aos favoritos\" data-favorite-icon=\"icon icon-electrical\">\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\/engenharia\/reatancia-ca\/\" method=\"POST\" class=\"calculator\" id=\"calculator-2035\" data-post=\"2035\"><fieldset class=\"fieldset-input is-2\"><legend class=\"sr-only\">Campos de entrada<\/legend><div class=\"field is-single\" id=\"input-1\"><label for=\"field-1\">Tipo de componente<\/label><div class=\"grid grid-cols-1\"><select id=\"field-1\" name=\"tipo_de_componente\"><option value=\"capacitor\" selected>Capacitor (reat\u00e2ncia capacitiva Xc)<\/option><option value=\"inductor\">Indutor (reat\u00e2ncia indutiva XL)<\/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><div class=\"field has-term\" id=\"input-2\"><label for=\"field-2\">Frequ\u00eancia (f)<\/label><div class=\"term\">f<\/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=\"frequncia_f\" id=\"field-2\" aria-describedby=\"calc-info-2\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"1.0E-6\" value=\"1000\"\/><div class=\"grid grid-cols-1\"><select id=\"field-3\" name=\"unidade_de_frequncia\" aria-label=\"Unidade de frequ\u00eancia\"><option value=\"Hz\" selected>Hz<\/option><option value=\"kHz\">kHz<\/option><option value=\"MHz\">MHz<\/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\">Frequ\u00eancia da alimenta\u00e7\u00e3o CA<\/small><\/div><div class=\"field has-term\" id=\"input-3\" hidden><label for=\"field-4\">Capacit\u00e2ncia (C)<\/label><div class=\"term\">C<\/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=\"capacitncia_c\" id=\"field-4\" aria-describedby=\"calc-info-4\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"1.0E-6\" value=\"1\"\/><div class=\"grid grid-cols-1\"><select id=\"field-5\" name=\"unidade_de_capacitncia\" aria-label=\"Unidade de capacit\u00e2ncia\"><option value=\"F\">F<\/option><option value=\"mF\">mF<\/option><option value=\"uF\" selected>\u00b5F<\/option><option value=\"nF\">nF<\/option><option value=\"pF\">pF<\/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\">Exibido apenas para capacitores<\/small><\/div><div class=\"field has-term\" id=\"input-4\" hidden><label for=\"field-6\">Indut\u00e2ncia (L)<\/label><div class=\"term\">L<\/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=\"indutncia_l\" id=\"field-6\" aria-describedby=\"calc-info-6\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"1.0E-6\" value=\"10\"\/><div class=\"grid grid-cols-1\"><select id=\"field-7\" name=\"unidade_de_indutncia\" aria-label=\"Unidade de indut\u00e2ncia\"><option value=\"H\">H<\/option><option value=\"mH\" selected>mH<\/option><option value=\"uH\">\u00b5H<\/option><option value=\"nH\">nH<\/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-6\">Exibido apenas para indutores<\/small><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Recalcular\" id=\"calculate-button\" data-post=\"2035\">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 reat\u00e2ncia<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>Reat\u00e2ncia<\/span><span class=\"result-term\">X<\/span><\/span><span class=\"field-value\" id=\"result-1\" data-unit=\"\u03a9\"><\/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-2\"><span class=\"field-title\"><span>Reat\u00e2ncia (formatada)<\/span><\/span><span class=\"field-value\" id=\"result-2\"><\/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=\"2035\" 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 reat\u00e2ncia em corrente alternada<\/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\">\\[ X_C = \\frac{1}{2\\pi f C} = \\frac{1}{\\omega C} \\\\ X_L = 2\\pi f L = \\omega L \\]<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Onde:<\/strong><\/p>\n<ul>\n<li>\\(X_C\\) \u2014 reat\u00e2ncia capacitiva em ohms (\u03a9), a oposi\u00e7\u00e3o que um capacitor oferece \u00e0 corrente alternada<\/li>\n<li>\\(X_L\\) \u2014 reat\u00e2ncia indutiva em ohms (\u03a9), a oposi\u00e7\u00e3o que um indutor oferece \u00e0 corrente alternada<\/li>\n<li>\\(f\\) \u2014 frequ\u00eancia da tens\u00e3o alternada em hertz (Hz)<\/li>\n<li>\\(\\omega = 2\\pi f\\) \u2014 frequ\u00eancia angular em radianos por segundo (rad\/s)<\/li>\n<li>\\(C\\) \u2014 capacit\u00e2ncia em farads (F)<\/li>\n<li>\\(L\\) \u2014 indut\u00e2ncia em henrys (H)<\/li>\n<\/ul>\n<p>As duas f\u00f3rmulas expressam comportamentos opostos: um capacitor op\u00f5e forte resist\u00eancia \u00e0s baixas frequ\u00eancias e deixa passar as altas frequ\u00eancias com facilidade, enquanto um indutor faz exatamente o contr\u00e1rio.<\/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>Reat\u00e2ncia CA \u2013 exemplo de c\u00e1lculo<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Exemplo:<\/strong> um capacitor de 1 \u00b5F \u00e9 ligado a uma fonte de corrente alternada de 1 kHz. Qual \u00e9 a sua reat\u00e2ncia?<\/p>\n<p>\\[ X_C = \\frac{1}{2\\pi f C} = \\frac{1}{2\\pi \\times 1000 \\times 1\\times 10^{-6}} \\]<\/p>\n<p>\\[ X_C = \\frac{1}{0.0062832} \\approx 159.155\\ \\Omega \\]<\/p>\n<p><strong>Resultado:<\/strong> a reat\u00e2ncia capacitiva \u00e9 de aproximadamente <strong>159,15 \u03a9<\/strong>. Nessa frequ\u00eancia, um capacitor ideal de 1 \u00b5F se comporta como uma imped\u00e2ncia de 159,15 \u03a9 (com a corrente adiantada de 90\u00b0 em rela\u00e7\u00e3o \u00e0 tens\u00e3o).<\/p>\n<p>\n\r\n<\/section>\n<h2>Como usar a calculadora de reat\u00e2ncia CA<\/h2>\n<ol>\n<li>No menu suspenso <strong>Tipo de componente<\/strong>, escolha <em>Capacitor (reat\u00e2ncia capacitiva Xc)<\/em> ou <em>Indutor (reat\u00e2ncia indutiva XL)<\/em>. A calculadora exibe apenas o campo de entrada correspondente \u00e0 sua escolha.<\/li>\n<li>Informe a <strong>frequ\u00eancia (f)<\/strong> da fonte de corrente alternada e selecione a unidade: Hz, kHz ou MHz.<\/li>\n<li>Para um capacitor, informe a <strong>capacit\u00e2ncia (C)<\/strong> e escolha uma unidade de F a pF. Para um indutor, informe a <strong>indut\u00e2ncia (L)<\/strong> e escolha uma unidade de H a nH.<\/li>\n<li>Leia a <strong>reat\u00e2ncia<\/strong> em ohms, junto com o valor formatado e os detalhes completos do c\u00e1lculo, incluindo a frequ\u00eancia angular \\(\\omega\\) utilizada.<\/li>\n<\/ol>\n<h2>O que \u00e9 reat\u00e2ncia?<\/h2>\n<p>Reat\u00e2ncia \u00e9 a oposi\u00e7\u00e3o que um capacitor ou um indutor oferece \u00e0 corrente alternada. Assim como a resist\u00eancia, ela \u00e9 medida em ohms e limita a corrente que circula para uma determinada tens\u00e3o. Ao contr\u00e1rio da resist\u00eancia, por\u00e9m, a reat\u00e2ncia armazena e devolve energia em vez de dissip\u00e1-la na forma de calor, e seu valor depende da frequ\u00eancia do sinal alternado.<\/p>\n<p>A reat\u00e2ncia capacitiva \\(X_C\\) \u00e9 inversamente proporcional \u00e0 frequ\u00eancia: conforme a frequ\u00eancia aumenta, o capacitor carrega e descarrega mais rapidamente, mais corrente circula e a oposi\u00e7\u00e3o diminui. Em corrente cont\u00ednua (0 Hz), um capacitor ideal \u00e9 um circuito aberto. J\u00e1 a reat\u00e2ncia indutiva \\(X_L\\) \u00e9 diretamente proporcional \u00e0 frequ\u00eancia: uma corrente que inverte rapidamente induz uma tens\u00e3o contr\u00e1ria mais intensa na bobina, de modo que a oposi\u00e7\u00e3o cresce. Em corrente cont\u00ednua, um indutor ideal \u00e9 um curto-circuito.<\/p>\n<p>A reat\u00e2ncia tamb\u00e9m introduz um defasamento. Em um capacitor puro, a corrente est\u00e1 adiantada de 90\u00b0 em rela\u00e7\u00e3o \u00e0 tens\u00e3o; em um indutor puro, a corrente est\u00e1 atrasada de 90\u00b0. Essa rela\u00e7\u00e3o de fase importa quando se combinam reat\u00e2ncias com resist\u00eancias: a oposi\u00e7\u00e3o total \u00e9 a <a href=\"https:\/\/wpcalc.com\/en\/engineering\/power-factor-correction\/\">imped\u00e2ncia<\/a>, e \u00e9 por isso que a reat\u00e2ncia \u00e9 central na an\u00e1lise de circuitos CA, no projeto de filtros e nos <a href=\"https:\/\/wpcalc.com\/en\/engineering\/lc-resonant-frequency\/\">circuitos ressonantes<\/a>.<\/p>\n<p>Vale notar que as reat\u00e2ncias capacitiva e indutiva t\u00eam sinais opostos quando combinadas: \\(X = X_L - X_C\\). Na frequ\u00eancia em que elas se cancelam, um circuito LC entra em resson\u00e2ncia e a reat\u00e2ncia resultante \u00e9 zero.<\/p>\n<h2>Premissas e limita\u00e7\u00f5es<\/h2>\n<ul>\n<li>A calculadora trata os componentes como <strong>ideais<\/strong>: sem resist\u00eancia s\u00e9rie equivalente (ESR), sem capacit\u00e2ncia ou indut\u00e2ncia parasitas e sem perdas no n\u00facleo dos indutores. Componentes reais se desviam desses valores, especialmente em altas frequ\u00eancias.<\/li>\n<li>A frequ\u00eancia deve ser positiva; a reat\u00e2ncia em exatamente 0 Hz \u00e9 indefinida para um capacitor (infinita) e zero para um indutor.<\/li>\n<li>O resultado \u00e9 apenas o <strong>m\u00f3dulo<\/strong> da reat\u00e2ncia. Para encontrar a corrente em um circuito, aplique a <a href=\"https:\/\/wpcalc.com\/en\/engineering\/ohms-law\/\">lei de Ohm<\/a> usando a reat\u00e2ncia no lugar da resist\u00eancia: \\(I = V\/X\\), lembrando do defasamento de 90\u00b0.<\/li>\n<li>Para o comportamento transit\u00f3rio (carga\/descarga) de circuitos RC, e n\u00e3o o regime permanente em corrente alternada, use a <a href=\"https:\/\/wpcalc.com\/en\/engineering\/rc-time-constant\/\">calculadora de constante de tempo RC<\/a>.<\/li>\n<\/ul>\n<h2>Valores t\u00edpicos de reat\u00e2ncia<\/h2>\n<p>A tabela abaixo mostra o qu\u00e3o rapidamente a reat\u00e2ncia varia com a frequ\u00eancia para valores comuns de componentes \u2014 a mesma tend\u00eancia que a calculadora reproduz.<\/p>\n<table>\n<thead>\n<tr>\n<th>Componente<\/th>\n<th>100 Hz<\/th>\n<th>1 kHz<\/th>\n<th>10 kHz<\/th>\n<th>100 kHz<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Capacitor de 1 \u00b5F<\/td>\n<td>1591,5 \u03a9<\/td>\n<td>159,2 \u03a9<\/td>\n<td>15,9 \u03a9<\/td>\n<td>1,59 \u03a9<\/td>\n<\/tr>\n<tr>\n<td>Capacitor de 100 nF<\/td>\n<td>15,9 k\u03a9<\/td>\n<td>1591,5 \u03a9<\/td>\n<td>159,2 \u03a9<\/td>\n<td>15,9 \u03a9<\/td>\n<\/tr>\n<tr>\n<td>Indutor de 10 mH<\/td>\n<td>6,28 \u03a9<\/td>\n<td>62,8 \u03a9<\/td>\n<td>628,3 \u03a9<\/td>\n<td>6283,2 \u03a9<\/td>\n<\/tr>\n<tr>\n<td>Indutor de 1 mH<\/td>\n<td>0,63 \u03a9<\/td>\n<td>6,28 \u03a9<\/td>\n<td>62,8 \u03a9<\/td>\n<td>628,3 \u03a9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Ao combinar v\u00e1rios capacitores para atingir uma reat\u00e2ncia desejada, lembre-se de que a capacit\u00e2ncia efetiva depende do tipo de liga\u00e7\u00e3o \u2014 consulte a <a href=\"https:\/\/wpcalc.com\/en\/engineering\/capacitors-in-series-and-parallel\/\">calculadora de associa\u00e7\u00e3o de capacitores<\/a> para obter o valor combinado.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Calcule a reat\u00e2ncia capacitiva (Xc) ou a reat\u00e2ncia indutiva (XL) de um componente em qualquer frequ\u00eancia de corrente alternada. Escolha o tipo de componente, informe a frequ\u00eancia e a capacit\u00e2ncia ou indut\u00e2ncia e obtenha a reat\u00e2ncia em ohms.<\/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":[6],"tags":[82],"class_list":["post-2035","post","type-post","status-publish","format-standard","hentry","category-engenharia","tag-circuitos"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2035","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=2035"}],"version-history":[{"count":0,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2035\/revisions"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/media?parent=2035"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/categories?post=2035"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/tags?post=2035"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}