{"id":82455,"date":"2024-01-14T13:18:31","date_gmt":"2024-01-14T13:18:31","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/resistivite-de-divers-materiaux-cuivre-argent-et-or\/"},"modified":"2024-01-23T13:07:29","modified_gmt":"2024-01-23T13:07:29","slug":"resistivite-de-divers-materiaux-cuivre-argent-et-or","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/fr\/resistivite-de-divers-materiaux-cuivre-argent-et-or\/","title":{"rendered":"R\u00e9sistivit\u00e9 de divers mat\u00e9riaux | Cuivre, Argent et Or"},"content":{"rendered":"<h2>R\u00e9sistivit\u00e9 des diff\u00e9rents mat\u00e9riaux<\/h2>\n<p>La r\u00e9sistivit\u00e9 est une propri\u00e9t\u00e9 intrins\u00e8que des mat\u00e9riaux qui d\u00e9crit leur capacit\u00e9 \u00e0 r\u00e9sister au passage du courant \u00e9lectrique. Elle est d\u00e9finie comme la r\u00e9sistance d&rsquo;une longueur unitaire d&rsquo;un mat\u00e9riau ayant une section transversale unitaire. La r\u00e9sistivit\u00e9 est g\u00e9n\u00e9ralement not\u00e9e par la lettre grecque rho (\u03c1) et s&rsquo;exprime en ohm-m\u00e8tres (\u03a9\u00b7m). Ce param\u00e8tre d\u00e9pend de divers facteurs tels que la composition chimique, la temp\u00e9rature et la structure cristalline du mat\u00e9riau.<\/p>\n<p>Les mat\u00e9riaux \u00e0 haute r\u00e9sistivit\u00e9 sont de mauvais conducteurs d&rsquo;\u00e9lectricit\u00e9, tandis que ceux \u00e0 faible r\u00e9sistivit\u00e9 sont de bons conducteurs. La r\u00e9sistivit\u00e9 d&rsquo;un mat\u00e9riau peut \u00eatre calcul\u00e9e \u00e0 l&rsquo;aide de la formule suivante :<\/p>\n<p style=\"text-align: center;\">\u03c1 = RA\/L<\/p>\n<p>o\u00f9 \u03c1 repr\u00e9sente la r\u00e9sistivit\u00e9, R est la r\u00e9sistance d&rsquo;un \u00e9chantillon du mat\u00e9riau, A est la section transversale de l&rsquo;\u00e9chantillon, et L est sa longueur. La r\u00e9sistivit\u00e9 peut \u00e9galement \u00eatre mesur\u00e9e exp\u00e9rimentalement, par exemple avec la technique de la sonde \u00e0 quatre pointes, qui implique de faire passer un courant connu \u00e0 travers un \u00e9chantillon du mat\u00e9riau et de mesurer la chute de tension \u00e0 ses extr\u00e9mit\u00e9s.<\/p>\n<p>La r\u00e9sistivit\u00e9 est une propri\u00e9t\u00e9 cruciale dans le domaine du g\u00e9nie \u00e9lectrique, influen\u00e7ant le choix des mat\u00e9riaux pour diverses applications. Par exemple, les mat\u00e9riaux \u00e0 faible r\u00e9sistivit\u00e9 comme le cuivre et l&rsquo;aluminium sont utilis\u00e9s pour les c\u00e2blages et les lignes de transmission \u00e9lectrique, tandis que ceux \u00e0 haute r\u00e9sistivit\u00e9 comme le nichrome sont utilis\u00e9s pour les \u00e9l\u00e9ments chauffants dans les appareils.<\/p>\n<h2>R\u00e9sistivit\u00e9 de divers mat\u00e9riaux<\/h2>\n<p>Voici 10 exemples de mat\u00e9riaux accompagn\u00e9s de leurs r\u00e9sistivit\u00e9s \u00e9lectriques :<\/p>\n<ul>\n<li><strong>Cuivre<\/strong> &#8211; R\u00e9sistivit\u00e9 \u00e9lectrique : 1.68 \u00d7 10<sup>-8<\/sup> \u03a9\u00b7m<\/li>\n<li><strong>Aluminium<\/strong> &#8211; R\u00e9sistivit\u00e9 \u00e9lectrique : 2.65 \u00d7 10<sup>-8<\/sup> \u03a9\u00b7m<\/li>\n<li><strong>Argent<\/strong> &#8211; R\u00e9sistivit\u00e9 \u00e9lectrique : 1.59 \u00d7 10<sup>-8<\/sup> \u03a9\u00b7m<\/li>\n<li><strong>Or<\/strong> &#8211; R\u00e9sistivit\u00e9 \u00e9lectrique : 2.44 \u00d7 10<sup>-8<\/sup> \u03a9\u00b7m<\/li>\n<li><strong>Laiton<\/strong> &#8211; R\u00e9sistivit\u00e9 \u00e9lectrique : 6.9 \u00d7 10<sup>-8<\/sup> \u03a9\u00b7m<\/li>\n<\/ul>\n<p><strong>Isolants :<\/strong><\/p>\n<ul>\n<li><strong>Verre<\/strong> &#8211; R\u00e9sistivit\u00e9 \u00e9lectrique : 10<sup>10<\/sup>-10<sup>14<\/sup> \u03a9\u00b7m<\/li>\n<li><strong>Caoutchouc<\/strong> &#8211; R\u00e9sistivit\u00e9 \u00e9lectrique : 10<sup>13<\/sup>-10<sup>15<\/sup> \u03a9\u00b7m<\/li>\n<li><strong>Air<\/strong> &#8211; R\u00e9sistivit\u00e9 \u00e9lectrique : 10<sup>16<\/sup>-10<sup>19<\/sup> \u03a9\u00b7m<\/li>\n<\/ul>\n<p><strong>Semi-conducteurs :<\/strong><\/p>\n<ul>\n<li><strong>Silicium<\/strong> &#8211; R\u00e9sistivit\u00e9 \u00e9lectrique : 2.3 \u00d7 10<sup>3<\/sup> \u03a9\u00b7cm<\/li>\n<li><strong>Germanium<\/strong> &#8211; R\u00e9sistivit\u00e9 \u00e9lectrique : 4.6 \u00d7 10<sup>2<\/sup> \u03a9\u00b7cm<\/li>\n<\/ul>\n<p>Il est important de noter que les valeurs de r\u00e9sistivit\u00e9 fournies sont approximatives et peuvent varier en fonction de la sp\u00e9cificit\u00e9 du mat\u00e9riau et des conditions. Ainsi, les conducteurs ont une faible r\u00e9sistivit\u00e9, les isolants une haute r\u00e9sistivit\u00e9, et les semi-conducteurs se situent entre les deux.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.electricity-magnetism.org\/wp-content\/uploads\/2022\/01\/logo.png\" alt=\"Resistivity of various materials\" \/><\/p>\n<div style=\"text-align: center; font-size: 20px;\">\n    <a href=\"https:\/\/www.electricity-magnetism.org\/resistivity-of-various-materials\/\">Original Article<\/a>\n<\/div>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Voici 10 exemples de mat\u00e9riaux avec leurs r\u00e9sistivit\u00e9s \u00e9lectriques : Cuivre &#8211; R\u00e9sistivit\u00e9 \u00e9lectrique : 1,68 \u00d7 10-8 \u03a9\u00b7m ; Aluminium &#8211; R\u00e9sistivit\u00e9 \u00e9lectrique : 2,65 \u00d7 10-8 \u03a9\u00b7m ; Argent &#8211; R\u00e9sistivit\u00e9 \u00e9lectrique : 1,59 \u00d7 10-8 \u03a9\u00b7m<\/p>\n","protected":false},"author":1,"featured_media":1576,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[10],"tags":[],"class_list":["post-82455","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classifiee","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>R\u00e9sistivit\u00e9 de divers mat\u00e9riaux | Cuivre, Argent et Or<\/title>\n<meta name=\"description\" content=\"Voici 10 exemples de mat\u00e9riaux avec leurs r\u00e9sistivit\u00e9s \u00e9lectriques : Cuivre - R\u00e9sistivit\u00e9 \u00e9lectrique : 1,68 \u00d7 10-8 \u03a9\u00b7m ; 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