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範例:切割磁力線與感應電動勢

設有一導線AC長度L,v之固定速率在金屬軌道DEFG上向右滑動,通過一均勻磁場B(如附圖)設電路ACEFA只有EF段有電阻R,則在導線AC通過此均勻磁場之期間內,下列物理量中有哪些是與v成正比的? (A)導線AC中之電流 (B)磁場作用於導線AC之力 (C)電路ACEFA中所消耗之電功率 (D)電阻R中所產生之總熱能 (E)電路ACEFA中所消耗之總電功。


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Posted in 電磁感應與冷次定律.

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