{"id":11238,"date":"2022-03-29T21:18:01","date_gmt":"2022-03-29T21:18:01","guid":{"rendered":"https:\/\/summitinterconnect.ca\/blog\/article\/quest-ce-quun-champ-electrique\/"},"modified":"2025-12-17T10:48:18","modified_gmt":"2025-12-17T10:48:18","slug":"electric-field","status":"publish","type":"post","link":"https:\/\/summitinterconnect.ca\/fr\/blog\/article\/electric-field\/","title":{"rendered":"Qu'est-ce qu'un champ \u00e9lectrique ?"},"content":{"rendered":"<h2>Champ \u00e9lectrique<\/h2>\n<p>Avant de discuter de ce qu'est un champ \u00e9lectrique, examinons le champ gravitationnel de la Terre pour obtenir des r\u00e9ponses g\u00e9n\u00e9rales sur les champs.<\/p>\n<h3>Champ gravitationnel<\/h3>\n<p>Lorsque nous pensons \u00e0 la gravit\u00e9, nous avons tendance \u00e0 imaginer des objets courants tombant vers la surface de la Terre. Mais cela ne repr\u00e9sente qu'une partie de l'interaction. Nous ne pensons pas \u00e0 l\u2019attraction de la Terre envers ces objets du quotidien, car l\u2019acc\u00e9l\u00e9ration de la Terre vers ces objets est imperceptiblement petite.<\/p>\n<p>Et nous ne pensons certainement pas aux objets du quotidien exer\u00e7ant une force gravitationnelle les uns sur les autres, car cette interaction gravitationnelle est si faible que nous ne l\u2019avons jamais observ\u00e9e directement. En dehors d'exp\u00e9riences soigneusement con\u00e7ues, il faut g\u00e9n\u00e9ralement un objet de taille astronomique pour g\u00e9n\u00e9rer les forces n\u00e9cessaires \u00e0 l'observation d'une interaction.<\/p>\n<h4>Faisons les calculs<\/h4>\n<p>En utilisant la masse gravitationnelle de deux objets, la constante de proportionnalit\u00e9 G et la distance entre les centres de masse des objets, nous pouvons d\u00e9terminer la force d\u2019attraction gravitationnelle entre eux. Pour effectuer les calculs correctement, nous devrions prendre en compte la masse et l\u2019emplacement exacts de chaque gisement de p\u00e9trole et de min\u00e9raux, chaque roche, chaque vague, chaque personne et chaque autre objet sur et dans la Terre. Mais cela repr\u00e9sente trop de travail, donc nous supposons une sph\u00e8re homog\u00e8ne.<\/p><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/03\/fields-1.jpg\" alt=\"\"><\/figure><section class=\"elementor-element elementor-element-98f483c elementor-section-boxed elementor-section-height-default elementor-section-height-default elementor-section elementor-top-section\" data-id=\"98f483c\" data-element_type=\"section\">\n<div class=\"elementor-container elementor-column-gap-default\">\n<div class=\"elementor-row\">\n<div class=\"elementor-element elementor-element-90597fc elementor-column elementor-col-100 elementor-top-column\" data-id=\"90597fc\" data-element_type=\"column\">\n<div class=\"elementor-column-wrap elementor-element-populated\">\n<div class=\"elementor-widget-wrap\">\n<div class=\"elementor-element elementor-element-533518f elementor-widget elementor-widget-text-editor\" data-id=\"533518f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n<div class=\"elementor-widget-container\">\n<div class=\"elementor-text-editor elementor-clearfix\">\n<p><span class=\"c0\">La loi de la gravitation universelle de Newton fournit la force d'attraction pour l'interaction entre la Terre (\u2295) et un objet arbitraire.<\/span><\/p>\n<p>\u00a0<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"elementor-element elementor-element-3195fd0 elementor-section-boxed elementor-section-height-default elementor-section-height-default elementor-section elementor-top-section\" data-id=\"3195fd0\" data-element_type=\"section\">\n<div class=\"elementor-container elementor-column-gap-default\">\n<div class=\"elementor-row\">\n<div class=\"elementor-element elementor-element-b9708fa elementor-column elementor-col-100 elementor-top-column\" data-id=\"b9708fa\" data-element_type=\"column\">\n<div class=\"elementor-column-wrap elementor-element-populated\">\n<div class=\"elementor-widget-wrap\">\n<div class=\"elementor-element elementor-element-d65b88a elementor-widget elementor-widget-image\" data-id=\"d65b88a\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n<div class=\"elementor-widget-container\">\n<div class=\"elementor-image\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"elementor-element elementor-element-a8452cc elementor-section-boxed elementor-section-height-default elementor-section-height-default elementor-section elementor-top-section\" data-id=\"a8452cc\" data-element_type=\"section\">\n<div class=\"elementor-container elementor-column-gap-default\">\n<div class=\"elementor-row\">\n<div class=\"elementor-element elementor-element-d992e9d elementor-column elementor-col-100 elementor-top-column\" data-id=\"d992e9d\" data-element_type=\"column\">\n<div class=\"elementor-column-wrap elementor-element-populated\">\n<div class=\"elementor-widget-wrap\">\n<div class=\"elementor-element elementor-element-b51a589 elementor-widget elementor-widget-text-editor\" data-id=\"b51a589\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n<div class=\"elementor-widget-container\">\n<div class=\"elementor-text-editor elementor-clearfix\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"elementor-element elementor-element-81ded76 elementor-section-boxed elementor-section-height-default elementor-section-height-default elementor-section elementor-top-section\" data-id=\"81ded76\" data-element_type=\"section\">\n<div class=\"elementor-container elementor-column-gap-default\">\n<div class=\"elementor-row\">\n<div class=\"elementor-element elementor-element-fa49b1d elementor-column elementor-col-100 elementor-top-column\" data-id=\"fa49b1d\" data-element_type=\"column\">\n<div class=\"elementor-column-wrap elementor-element-populated\">\n<div class=\"elementor-widget-wrap\">\n<div class=\"elementor-element elementor-element-3ad889d elementor-widget elementor-widget-text-editor\" data-id=\"3ad889d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n<div class=\"elementor-widget-container\">\n<div class=\"elementor-text-editor elementor-clearfix\">\n<p class=\"c2\">\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/03\/EQ-1.gif\" alt=\"\"><\/figure><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/03\/EQ-2.png\" alt=\"\"><\/figure><section class=\"elementor-element elementor-element-98f483c elementor-section-boxed elementor-section-height-default elementor-section-height-default elementor-section elementor-top-section\" data-id=\"98f483c\" data-element_type=\"section\">\n<div class=\"elementor-container elementor-column-gap-default\">\n<div class=\"elementor-row\">\n<div class=\"elementor-element elementor-element-90597fc elementor-column elementor-col-100 elementor-top-column\" data-id=\"90597fc\" data-element_type=\"column\">\n<div class=\"elementor-column-wrap elementor-element-populated\">\n<div class=\"elementor-widget-wrap\">\n<div class=\"elementor-element elementor-element-533518f elementor-widget elementor-widget-text-editor\" data-id=\"533518f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n<div class=\"elementor-widget-container\">\n<div class=\"elementor-text-editor elementor-clearfix\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"elementor-element elementor-element-4a0c07e elementor-section-boxed elementor-section-height-default elementor-section-height-default elementor-section elementor-top-section\" data-id=\"4a0c07e\" data-element_type=\"section\">\n<div class=\"elementor-container elementor-column-gap-default\">\n<div class=\"elementor-row\">\n<div class=\"elementor-element elementor-element-7244b89 elementor-column elementor-col-100 elementor-top-column\" data-id=\"7244b89\" data-element_type=\"column\">\n<div class=\"elementor-column-wrap elementor-element-populated\">\n<div class=\"elementor-widget-wrap\">\n<div class=\"elementor-element elementor-element-5c15a0c elementor-widget elementor-widget-text-editor\" data-id=\"5c15a0c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n<div class=\"elementor-widget-container\">\n<div class=\"elementor-text-editor elementor-clearfix\">\n<p><span class=\"c0\">La th\u00e9orie de la relativit\u00e9 d'Einstein et toutes les exp\u00e9riences r\u00e9alis\u00e9es jusqu'\u00e0 pr\u00e9sent ont montr\u00e9 une \u00e9quivalence entre la masse inertielle et la masse gravitationnelle, ce qui nous permet de justifier de les \u00e9tablir \u00e0 \u00e9galit\u00e9.<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/03\/EQ-3.gif\" alt=\"\"><\/figure><section class=\"elementor-element elementor-element-4a0c07e elementor-section-boxed elementor-section-height-default elementor-section-height-default elementor-section elementor-top-section\" data-id=\"4a0c07e\" data-element_type=\"section\">\n<div class=\"elementor-container elementor-column-gap-default\">\n<div class=\"elementor-row\">\n<div class=\"elementor-element elementor-element-7244b89 elementor-column elementor-col-100 elementor-top-column\" data-id=\"7244b89\" data-element_type=\"column\">\n<div class=\"elementor-column-wrap elementor-element-populated\">\n<div class=\"elementor-widget-wrap\">\n<div class=\"elementor-element elementor-element-5c15a0c elementor-widget elementor-widget-text-editor\" data-id=\"5c15a0c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n<div class=\"elementor-widget-container\">\n<div class=\"elementor-text-editor elementor-clearfix\">Et pour simplifier encore les choses, nous pourrions tout aussi bien remplacer ce rayon de la Terre dans l'\u00e9quation par la distance de s\u00e9paration, r, puisque presque toute activit\u00e9 humaine se d\u00e9roule \u00e0 quelques dizaines de kilom\u00e8tres de la surface de la Terre. Nous pouvons alors r\u00e9soudre les \u00e9quations d'acc\u00e9l\u00e9ration \u00e0 la surface ou \u00e0 proximit\u00e9 de la surface. <\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/03\/EQ-4.png\" alt=\"\"><\/figure><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/03\/EQ-5.gif\" alt=\"\"><\/figure><section class=\"elementor-element elementor-element-98f483c elementor-section-boxed elementor-section-height-default elementor-section-height-default elementor-section elementor-top-section\" data-id=\"98f483c\" data-element_type=\"section\">\n<div class=\"elementor-container elementor-column-gap-default\">\n<div class=\"elementor-row\">\n<div class=\"elementor-element elementor-element-90597fc elementor-column elementor-col-100 elementor-top-column\" data-id=\"90597fc\" data-element_type=\"column\">\n<div class=\"elementor-column-wrap elementor-element-populated\">\n<div class=\"elementor-widget-wrap\">\n<div class=\"elementor-element elementor-element-533518f elementor-widget elementor-widget-text-editor\" data-id=\"533518f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n<div class=\"elementor-widget-container\">\n<div class=\"elementor-text-editor elementor-clearfix\">La r\u00e9ponse qui en r\u00e9sulte est beaucoup plus facile \u00e0 utiliser que les \u00e9quations pr\u00e9c\u00e9dentes et est ind\u00e9pendante de la masse de l'objet.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/03\/EQ-6.gif\" alt=\"\"><\/figure><p class=\"c2\">Tous les humains vivant pr\u00e8s de la surface de la Terre, des mineurs souterrains aux pilotes d'avions commerciaux, subissent cette m\u00eame acc\u00e9l\u00e9ration vers le centre de la Terre. Il est bien plus simple de travailler avec <em>g<\/em> = 9,8( <em>m<\/em> \/ <em><sup>s\u00b2<\/sup><\/em> ) que de proc\u00e9der \u00e0 cette d\u00e9rivation \u00e0 chaque fois que l'on souhaite d\u00e9terminer l'acc\u00e9l\u00e9ration d'un nouvel objet. La masse de l'objet s'annulant syst\u00e9matiquement, l'acc\u00e9l\u00e9ration sera toujours d'environ <em>g<\/em> = 9,8( <em>m<\/em> \/ <em><sup>s\u00b2<\/sup><\/em> ) <span class=\"c0\">.<\/span>   <\/p>\n<p class=\"c2\"><span class=\"c0\">La Terre n'est pas homog\u00e8ne et n'est pas une sph\u00e8re. C'est un ellipso\u00efde avec des montagnes et des vall\u00e9es, des gisements de p\u00e9trole et de min\u00e9raux, des oc\u00e9ans et toutes sortes de caract\u00e9ristiques uniques. Le champ gravitationnel qui entoure la Terre n'est pas uniforme.    <\/span><\/p>\n<p class=\"c2\"><span class=\"c0\">Imaginez que vous laissiez tomber un objet \u00e0 800 endroits r\u00e9partis de mani\u00e8re \u00e9gale autour du globe et que vous dessiniez une fl\u00e8che \u00e0 cet endroit pour indiquer la direction de l'acc\u00e9l\u00e9ration. Dans ce cas, vous pourriez vous retrouver avec l'image ci-dessous. <\/span><\/p><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/04\/image10-pmj9xpdi6o06fsq3j1k3e04lsleb4te0xq0l8fj3pk.jpg\" alt=\"\"><figcaption class=\"img-caption__caption\">Ce champ vectoriel tridimensionnel montre la direction et l&#039;amplitude de l&#039;acc\u00e9l\u00e9ration \u00e0 des points \u00e9quidistants pr\u00e8s de la surface de la Terre. Les couleurs de l&#039;arc-en-ciel indiquent la diff\u00e9rence relative par rapport \u00e0 l&#039;acc\u00e9l\u00e9ration moyenne, les fl\u00e8ches rouges indiquant une amplitude d&#039;acc\u00e9l\u00e9ration plus \u00e9lev\u00e9e pr\u00e8s des p\u00f4les et les violettes indiquant une amplitude d&#039;acc\u00e9l\u00e9ration plus faible pr\u00e8s de l&#039;\u00e9quateur. <\/figcaption><\/figure><h3 id=\"h.6m486lk0slbf\" class=\"c6\"><span class=\"c4\">Champs vectoriels<\/span><\/h3>\n<p class=\"c2\"><span class=\"c0\">Si la longueur de la fl\u00e8che est proportionnelle \u00e0 la grandeur de l'acc\u00e9l\u00e9ration, la fl\u00e8che devient un vecteur. Math\u00e9matiquement, l'ensemble des vecteurs est un champ vectoriel, et une valeur est d\u00e9finie partout dans la r\u00e9gion, pas seulement aux emplacements d\u00e9finis par les fl\u00e8ches.   <\/span><\/p>\n<p class=\"c2\"><span class=\"c0\">Les champs sont des constructions math\u00e9matiques qui montrent comment les propri\u00e9t\u00e9s d'un objet changent dans une r\u00e9gion \u00e0 deux ou trois dimensions.<\/span><\/p>\n<p class=\"c2\">\u00c9tant donn\u00e9 que le champ vectoriel que nous avons utilis\u00e9 dans notre exemple est d\u00fb \u00e0 la gravit\u00e9, un autre nom pour la collection de fl\u00e8ches est un <span class=\"c21\">champ gravitationnel<\/span> <span class=\"c0\">.<\/span> <\/p>","protected":false},"excerpt":{"rendered":"<p>Champ \u00e9lectrique Avant de discuter de ce qu'est un champ \u00e9lectrique, examinons le champ gravitationnel de la Terre pour obtenir des r\u00e9ponses g\u00e9n\u00e9rales sur les champs. Champ gravitationnel Lorsque nous pensons \u00e0 la gravit\u00e9, nous avons tendance \u00e0 imaginer des objets courants tombant vers la surface de la Terre. Mais cela ne repr\u00e9sente qu'une partie [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[87],"tags":[89,90,88],"class_list":["post-11238","post","type-post","status-publish","format-standard","hentry","category-theorie","tag-energie","tag-innovation-fr","tag-moteur"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Qu&#039;est-ce qu&#039;un champ \u00e9lectrique ? - Summit Interconnect CA<\/title>\n<meta name=\"description\" content=\"Summit Interconnect, une soci\u00e9t\u00e9 de fabrication de circuits imprim\u00e9s, explique le concept des champs \u00e9lectriques et ses applications dans Quick Turn PCB.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/summitinterconnect.ca\/fr\/blog\/article\/electric-field\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Qu&#039;est-ce qu&#039;un champ \u00e9lectrique ? 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