{"id":5683,"date":"2026-10-14T08:43:47","date_gmt":"2026-10-14T05:43:47","guid":{"rendered":"https:\/\/wpcalc.com\/fr\/ingenierie\/reactance-courant-alternatif\/"},"modified":"2026-10-14T08:43:47","modified_gmt":"2026-10-14T05:43:47","slug":"reactance-courant-alternatif","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/fr\/ingenierie\/reactance-courant-alternatif\/","title":{"rendered":"R\u00e9actance en courant alternatif"},"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\">Calculez l&#039;opposition d&#039;un condensateur ou d&#039;une bobine au courant alternatif<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"5683\" data-favorite-title=\"R\u00e9actance en courant alternatif\" data-favorite-url=\"https:\/\/wpcalc.com\/fr\/ingenierie\/reactance-courant-alternatif\/\" data-favorite-excerpt=\"Calculez la r\u00e9actance capacitive (Xc) ou inductive (XL) d\u2019un composant \u00e0 n\u2019importe quelle fr\u00e9quence. Choisissez le type de composant, saisissez la fr\u00e9quence ainsi que la capacit\u00e9 ou l\u2019inductance, et obtenez la r\u00e9actance en ohms.\" aria-label=\"Ajouter aux favoris\" 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\/fr\/ingenierie\/reactance-courant-alternatif\/\" method=\"POST\" class=\"calculator\" id=\"calculator-5683\" data-post=\"5683\"><fieldset class=\"fieldset-input is-2\"><legend class=\"sr-only\">Champs de saisie<\/legend><div class=\"field is-single\" id=\"input-1\"><label for=\"field-1\">Type de composant<\/label><div class=\"grid grid-cols-1\"><select id=\"field-1\" name=\"type_de_composant\"><option value=\"capacitor\" selected>Condensateur (r\u00e9actance capacitive Xc)<\/option><option value=\"inductor\">Bobine (r\u00e9actance inductive 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\">Fr\u00e9quence (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=\"frquence_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=\"unit_de_frquence\" aria-label=\"Unit\u00e9 de fr\u00e9quence\"><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\">Fr\u00e9quence de l&#039;alimentation en courant alternatif<\/small><\/div><div class=\"field has-term\" id=\"input-3\" hidden><label for=\"field-4\">Capacit\u00e9 (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=\"capacit_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=\"unit_de_capacit\" aria-label=\"Unit\u00e9 de capacit\u00e9\"><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\">Affich\u00e9e uniquement pour les condensateurs<\/small><\/div><div class=\"field has-term\" id=\"input-4\" hidden><label for=\"field-6\">Inductance (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=\"inductance_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=\"unit_dinductance\" aria-label=\"Unit\u00e9 d&#039;inductance\"><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\">Affich\u00e9e uniquement pour les bobines<\/small><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Recalculer\" id=\"calculate-button\" data-post=\"5683\">Calculer<\/button><button type=\"reset\">R\u00e9initialiser<\/button><\/div><div class=\"field is-checkbox hidden!\" id=\"field-auto-calc\"><input type=\"checkbox\" id=\"auto-calc\"><label for=\"auto-calc\">Calculer automatiquement<\/label><small>Si activ\u00e9, le r\u00e9sultat se met \u00e0 jour automatiquement d\u00e8s que vous modifiez une valeur.<\/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> R\u00e9sultats de la r\u00e9actance<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>R\u00e9actance<\/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=\"Copier le r\u00e9sultat\" aria-label=\"Copier le r\u00e9sultat\"><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>R\u00e9actance (format lisible)<\/span><\/span><span class=\"field-value\" id=\"result-2\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copier le r\u00e9sultat\" aria-label=\"Copier le r\u00e9sultat\"><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>D\u00e9tails du calcul<\/span><\/span><span class=\"field-value\" id=\"result-3\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copier le r\u00e9sultat\" aria-label=\"Copier le r\u00e9sultat\"><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\">Copier le lien vers ce calcul<\/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>Laisser un commentaire<\/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=\"5683\" aria-live=\"polite\" aria-labelledby=\"calc-reactions-title\"><p id=\"calc-reactions-title\" class=\"text-sm text-gray-500 text-center mb-2\">Que pensez-vous de ce r\u00e9sultat\u00a0?<\/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\">J\u2019aime <\/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\">Utile <\/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\">Confus <\/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\">D\u00e9\u00e7u <\/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\">Inexact <\/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>Formule de la r\u00e9actance en courant alternatif<\/h2><\/div>\r\n\t<figure class=\"not-prose formula\">\r\n\t\t<figcaption class=\"formula-title\">Formule<\/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>O\u00f9&nbsp;:<\/strong><\/p>\n<ul>\n<li>\\(X_C\\) \u2014 r\u00e9actance capacitive en ohms (\u03a9), l\u2019opposition qu\u2019un condensateur offre au courant alternatif<\/li>\n<li>\\(X_L\\) \u2014 r\u00e9actance inductive en ohms (\u03a9), l\u2019opposition qu\u2019une bobine offre au courant alternatif<\/li>\n<li>\\(f\\) \u2014 fr\u00e9quence de la source de courant alternatif, en hertz (Hz)<\/li>\n<li>\\(\\omega = 2\\pi f\\) \u2014 pulsation, en radians par seconde (rad\/s)<\/li>\n<li>\\(C\\) \u2014 capacit\u00e9, en farads (F)<\/li>\n<li>\\(L\\) \u2014 inductance, en henrys (H)<\/li>\n<\/ul>\n<p>Ces deux formules traduisent des comportements oppos\u00e9s : un condensateur s\u2019oppose fortement aux basses fr\u00e9quences et laisse passer facilement les hautes fr\u00e9quences, tandis qu\u2019une bobine fait exactement l\u2019inverse.<\/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>R\u00e9actance en courant alternatif \u2013 Exemple de calcul<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Exemple&nbsp;:<\/strong> un condensateur de 1 \u00b5F est reli\u00e9 \u00e0 une source de courant alternatif de 1 kHz. Quelle est sa r\u00e9actance ?<\/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>R\u00e9sultat&nbsp;:<\/strong> la r\u00e9actance capacitive vaut environ <strong>159,15 \u03a9<\/strong>. \u00c0 cette fr\u00e9quence, un condensateur id\u00e9al de 1 \u00b5F se comporte comme une imp\u00e9dance de 159,15 \u03a9 (le courant \u00e9tant en avance de 90\u00b0 sur la tension).<\/p>\n<p>\n\r\n<\/section>\n<h2>Comment utiliser le calculateur de r\u00e9actance en courant alternatif<\/h2>\n<ol>\n<li>Dans le menu d\u00e9roulant <strong>Type de composant<\/strong>, choisissez <em>Condensateur (r\u00e9actance capacitive Xc)<\/em> ou <em>Bobine (r\u00e9actance inductive XL)<\/em>. Le calculateur n\u2019affiche que le champ de saisie correspondant \u00e0 votre choix.<\/li>\n<li>Saisissez la <strong>Fr\u00e9quence (f)<\/strong> de la source de courant alternatif et s\u00e9lectionnez son unit\u00e9 : Hz, kHz ou MHz.<\/li>\n<li>Pour un condensateur, saisissez la <strong>Capacit\u00e9 (C)<\/strong> et choisissez une unit\u00e9 de F \u00e0 pF. Pour une bobine, saisissez l\u2019<strong>Inductance (L)<\/strong> et choisissez une unit\u00e9 de H \u00e0 nH.<\/li>\n<li>Lisez la <strong>R\u00e9actance<\/strong> en ohms, accompagn\u00e9e de la valeur en clair et du d\u00e9tail complet du calcul, y compris la pulsation \\(\\omega\\) utilis\u00e9e.<\/li>\n<\/ol>\n<h2>Qu\u2019est-ce que la r\u00e9actance&nbsp;?<\/h2>\n<p>La r\u00e9actance est l\u2019opposition qu\u2019un condensateur ou une bobine pr\u00e9sente au courant alternatif. Comme la r\u00e9sistance, elle se mesure en ohms et limite le courant qui circule pour une tension donn\u00e9e. Mais contrairement \u00e0 la r\u00e9sistance, la r\u00e9actance emmagasine de l\u2019\u00e9nergie puis la restitue au lieu de la dissiper en chaleur, et sa valeur d\u00e9pend de la fr\u00e9quence du signal alternatif.<\/p>\n<p>La r\u00e9actance capacitive \\(X_C\\) est inversement proportionnelle \u00e0 la fr\u00e9quence : quand la fr\u00e9quence augmente, le condensateur se charge et se d\u00e9charge plus vite, davantage de courant circule et l\u2019opposition diminue. En continu (0 Hz), un condensateur id\u00e9al est un circuit ouvert. La r\u00e9actance inductive \\(X_L\\) est directement proportionnelle \u00e0 la fr\u00e9quence : un courant qui s\u2019inverse rapidement induit une tension oppos\u00e9e plus forte dans la bobine, donc l\u2019opposition augmente. En continu, une bobine id\u00e9ale est un court-circuit.<\/p>\n<p>La r\u00e9actance introduit \u00e9galement un d\u00e9phasage. Dans un condensateur pur, le courant est en avance de 90\u00b0 sur la tension ; dans une bobine pure, il est en retard de 90\u00b0. Cette relation de phase compte d\u00e8s qu\u2019on combine r\u00e9actances et r\u00e9sistances : l\u2019opposition totale est l\u2019<a href=\"https:\/\/wpcalc.com\/en\/engineering\/power-factor-correction\/\">imp\u00e9dance<\/a>, ce qui explique pourquoi la r\u00e9actance est au c\u0153ur de l\u2019analyse des circuits en courant alternatif, de la conception des filtres et des <a href=\"https:\/\/wpcalc.com\/en\/engineering\/lc-resonant-frequency\/\">circuits r\u00e9sonants<\/a>.<\/p>\n<p>Notez que les r\u00e9actances capacitive et inductive sont de signes oppos\u00e9s lorsqu\u2019on les combine : \\(X = X_L - X_C\\). \u00c0 la fr\u00e9quence o\u00f9 elles s\u2019annulent, un circuit LC entre en r\u00e9sonance et la r\u00e9actance r\u00e9sultante est nulle.<\/p>\n<h2>Hypoth\u00e8ses et limites<\/h2>\n<ul>\n<li>Le calculateur consid\u00e8re les composants comme <strong>id\u00e9aux<\/strong>&nbsp;: sans r\u00e9sistance s\u00e9rie \u00e9quivalente (ESR), sans capacit\u00e9 ni inductance parasite, et sans pertes dans le noyau des bobines. Les composants r\u00e9els s\u2019\u00e9cartent de ces valeurs, surtout \u00e0 haute fr\u00e9quence.<\/li>\n<li>La fr\u00e9quence doit \u00eatre positive&nbsp;; \u00e0 exactement 0 Hz, la r\u00e9actance est ind\u00e9finie pour un condensateur (infinie) et nulle pour une bobine.<\/li>\n<li>Le r\u00e9sultat donne uniquement la <strong>valeur absolue<\/strong> de la r\u00e9actance. Pour trouver le courant dans un circuit, appliquez la <a href=\"https:\/\/wpcalc.com\/en\/engineering\/ohms-law\/\">loi d\u2019Ohm<\/a> avec la r\u00e9actance \u00e0 la place de la r\u00e9sistance : \\(I = V\/X\\), sans oublier le d\u00e9phasage de 90\u00b0.<\/li>\n<li>Pour le comportement transitoire (charge\/d\u00e9charge) des circuits RC plut\u00f4t que le r\u00e9gime alternatif \u00e9tabli, utilisez le <a href=\"https:\/\/wpcalc.com\/en\/engineering\/rc-time-constant\/\">calculateur de constante de temps RC<\/a>.<\/li>\n<\/ul>\n<h2>Valeurs de r\u00e9actance typiques<\/h2>\n<p>Le tableau ci-dessous montre \u00e0 quelle vitesse la r\u00e9actance \u00e9volue avec la fr\u00e9quence pour des valeurs de composants courantes \u2014 la m\u00eame tendance que celle que reproduira le calculateur.<\/p>\n<table>\n<thead>\n<tr>\n<th>Composant<\/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>Condensateur de 1 \u00b5F<\/td>\n<td>1 591,5 \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>Condensateur de 100 nF<\/td>\n<td>15,9 k\u03a9<\/td>\n<td>1 591,5 \u03a9<\/td>\n<td>159,2 \u03a9<\/td>\n<td>15,9 \u03a9<\/td>\n<\/tr>\n<tr>\n<td>Bobine de 10 mH<\/td>\n<td>6,28 \u03a9<\/td>\n<td>62,8 \u03a9<\/td>\n<td>628,3 \u03a9<\/td>\n<td>6 283,2 \u03a9<\/td>\n<\/tr>\n<tr>\n<td>Bobine 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>Lorsque vous associez plusieurs condensateurs pour atteindre une r\u00e9actance cible, gardez \u00e0 l\u2019esprit que la capacit\u00e9 \u00e9quivalente d\u00e9pend du mode de connexion \u2014 consultez le <a href=\"https:\/\/wpcalc.com\/en\/engineering\/capacitors-in-series-and-parallel\/\">calculateur de r\u00e9seaux de condensateurs<\/a> pour obtenir la valeur combin\u00e9e.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Calculez la r\u00e9actance capacitive (Xc) ou inductive (XL) d\u2019un composant \u00e0 n\u2019importe quelle fr\u00e9quence. Choisissez le type de composant, saisissez la fr\u00e9quence ainsi que la capacit\u00e9 ou l\u2019inductance, et obtenez la r\u00e9actance en 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":[8],"tags":[80],"class_list":["post-5683","post","type-post","status-publish","format-standard","hentry","category-ingenierie","tag-circuits"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/fr\/wp-json\/wp\/v2\/posts\/5683","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpcalc.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpcalc.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/fr\/wp-json\/wp\/v2\/users\/3168"}],"replies":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/fr\/wp-json\/wp\/v2\/comments?post=5683"}],"version-history":[{"count":1,"href":"https:\/\/wpcalc.com\/fr\/wp-json\/wp\/v2\/posts\/5683\/revisions"}],"predecessor-version":[{"id":6074,"href":"https:\/\/wpcalc.com\/fr\/wp-json\/wp\/v2\/posts\/5683\/revisions\/6074"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/fr\/wp-json\/wp\/v2\/media?parent=5683"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/fr\/wp-json\/wp\/v2\/categories?post=5683"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/fr\/wp-json\/wp\/v2\/tags?post=5683"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}