{"id":2132,"date":"2024-07-24T18:35:26","date_gmt":"2024-07-24T16:36:19","guid":{"rendered":"https:\/\/experiments.school\/?post_type=product&p=2132"},"modified":"2024-07-24T18:36:20","modified_gmt":"2024-07-24T16:36:20","slug":"015-detection-de-charge-electrique","status":"publish","type":"product","link":"https:\/\/experiments.school\/fr\/produkt\/015-detection-de-charge-electrique\/","title":{"rendered":"015 – D\u00e9tection de charge \u00e9lectrique"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"

La radio comme d\u00e9tecteur de charge\u00a0\u00a0<\/strong><\/h2>\n

Antenne comme paratonnerre\u00a0\u00a0<\/strong><\/h2>\n

 <\/p>\n

Introduction \u00e0:\u00a0<\/span>\u00a0<\/span><\/h2>\n
    \n
  • Tribo\u00e9lectricit\u00e9\u00a0<\/span>\u00a0<\/span><\/li>\n
  • Charge\u00a0<\/span>\u00a0<\/span><\/li>\n<\/ul>\n[video width=\"1920\" height=\"1080\" mp4=\"https:\/\/experiments.school\/wp-content\/uploads\/2024\/07\/015-video-end.mp4\"][\/video]\n

     <\/p>\n

    Mat\u00e9riel:\u00a0<\/span>\u00a0<\/span><\/h2>\n
      \n
    • Radio \u00e0 transistors avec antenne externe\u00a0<\/span>\u00a0<\/span><\/li>\n<\/ul>\n

      M\u00e9canisme de friction:<\/span><\/p>\n

        \n
      • Tige en plastique (par exemple tuyau en PVC) \/ r\u00e8gle en plastique\u00a0<\/span>\u00a0<\/span><\/li>\n
      • Drap de laine (par exemple \u00e9charpe, pull) ou peau de mouton\u00a0<\/span>\u00a0<\/span><\/li>\n<\/ul>\n

        Montage:\u00a0<\/span>\u00a0<\/span><\/h2>\n
          \n
        • R\u00e9glez la radio sur une fr\u00e9quence sans \u00e9metteur.\u00a0<\/span>\u00a0<\/span><\/li>\n
        • Montez le volume du haut-parleur \u00e0 fond.\u00a0<\/span>\u00a0<\/span><\/li>\n
        • Chargez \u00e9lectriquement la tige en plastique avec le chiffon de laine.<\/span>\u00a0<\/span><\/li>\n<\/ul>\n

          Ex\u00e9cution:\u00a0<\/span>\u00a0<\/span><\/h2>\n
            \n
          1. Cousez la tige en plastique de l\u2019antenne pour la fermer.\u00a0<\/span><\/li>\n
          2. Retirez la tige en plastique de l\u2019antenne.\u00a0<\/span><\/li>\n<\/ol>\n

            Observation:\u00a0<\/span>\u00a0<\/span><\/h2>\n
              \n
            1. Le bruit dans le haut-parleur devient plus faible.\u00a0<\/span><\/li>\n
            2. Des \u00ab\u202fbruits de craquement\u202f\u00bb peuvent \u00eatre entendus du haut-parleur.\u00a0<\/span><\/li>\n<\/ol>\n

              Explication:\u00a0<\/span>\u00a0<\/span><\/h2>\n
                \n
              • Le frottement entre la tige en plastique et le drap de laine s\u00e9pare les charges \u00e9lectriques, de sorte que la tige en plastique devient charg\u00e9e \u00e9lectriquement.\u00a0<\/span>\u00a0<\/span><\/li>\n<\/ul>\n
                  \n
                1. Les charges sur la tige en plastique cr\u00e9ent un champ \u00e9lectrique. Cela interf\u00e8re avec les ondes \u00e9lectromagn\u00e9tiques que la radio re\u00e7oit.\u00a0<\/span><\/li>\n
                2. La diff\u00e9rence de potentiel entre la tige en plastique et l\u2019antenne est de quelques milliers de volts et entra\u00eene des embrasements lorsqu\u2019on le touche. Ceux-ci sont convertis en \u00ab\u202fcraquements\u202f\u00bb par la radio. Dans ce processus, les charges s\u2019\u00e9coulent de la tige en plastique via l\u2019antenne vers la Terre.\u00a0<\/span><\/li>\n<\/ol>\n

                  Indice:<\/span>\u00a0<\/span><\/h2>\n
                    \n
                  • Les tests avec de l\u2019\u00e9lectricit\u00e9 par friction ne fonctionnent pas dans l\u2019air humide ou avec des mat\u00e9riaux humides.\u00a0<\/span>\u00a0<\/span><\/li>\n<\/ul>\n","protected":false},"featured_media":2134,"template":"","meta":[],"product_brand":[],"product_cat":[973,988,883],"product_tag":[],"class_list":{"0":"post-2132","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-1-electrostatique-charge","7":"product_cat-6-magnetisme-electromagnetisme","8":"product_cat-b-electricite-fr","9":"","10":"woocommerce-text-align-left","11":"woocommerce-image-align-center","13":"first","14":"instock","15":"shipping-taxable","16":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/product\/2132","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/media\/2134"}],"wp:attachment":[{"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/media?parent=2132"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/product_brand?post=2132"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/product_cat?post=2132"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/product_tag?post=2132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}