{"id":5035,"date":"2024-12-05T19:13:43","date_gmt":"2024-12-05T17:13:43","guid":{"rendered":"https:\/\/soigneralzheimer.com\/?p=5035"},"modified":"2024-12-05T19:13:45","modified_gmt":"2024-12-05T17:13:45","slug":"bobines-et-induction-electromagnetique","status":"publish","type":"post","link":"https:\/\/soigneralzheimer.com\/fr\/bobines-et-induction-electromagnetique\/","title":{"rendered":"Bobines et induction \u00e9lectromagn\u00e9tique"},"content":{"rendered":"\n

Apr\u00e8s ces quelques semaines de d\u00e9couverte du mat\u00e9riel pr\u00e9sent dans le laboratoire, j’ai eu envie de m’amuser un peu avec les bobines. J’ai certe appris le principe de l’induction pendant mes \u00e9tudes, mais je n’ai jamais vraiment eu l’occasion de l’experimenter.<\/p>\n\n\n\n

J’ai donc plac\u00e9 une bobine sur une branche du U en fer, l’autre sur l’autre, et la barre en fer par dessus (merci \u00e0 mon physicien de mari pour la suggestion). J’ai ensuite branch\u00e9 la premi\u00e8re bobine \u00e0 l’alimentation de tension alternative, branch\u00e9 un voltm\u00e8tre sur la deuxi\u00e8me et augment\u00e9 gentiment la tension en notant les valeurs de tension induite sur la deuxi\u00e8me bobine. D’apr\u00e8s le mari \ud83d\ude09 le rapport des tensions devrait correspondre au rapport du nombre de tours des bobines et \u00e7a joue plus ou moins.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Pour montrer qu’un courant passe effectivement dans la deuxi\u00e8me bobine gr\u00e2ce \u00e0 l’induction \u00e9lectromagn\u00e9tique, j’ai branch\u00e9 une petite lampe.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Avec les \u00e9l\u00e8ves de la 11\u00e8me, nous avons \u00e9tudi\u00e9 les diff\u00e9rents types de branchement et compar\u00e9 le branchement en parall\u00e8le, celui qu’on utilise dans les m\u00e9nage pour brancher les diff\u00e9rents appareils \u00e9lectriques, et le branchement en s\u00e9rie. C’est une exp\u00e9rience peu on\u00e9reuse et facile \u00e0 r\u00e9aliser.<\/p>\n\n\n\n

\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

Apr\u00e8s ces quelques semaines de d\u00e9couverte du mat\u00e9riel pr\u00e9sent dans le laboratoire, j’ai eu envie de m’amuser un peu avec les bobines. J’ai certe appris le principe de l’induction pendant mes \u00e9tudes, mais je n’ai jamais vraiment eu l’occasion de l’experimenter. J’ai donc plac\u00e9 une bobine sur une branche du U en fer, l’autre sur 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