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範例:法拉第定律與切割磁力線

如附圖所示,兩水平平行軌道相距L,強度B的均勻磁場垂直軌道面向上,兩條材料相同的金屬導線abcd分別跨在軌道上,若abcd之速度大小各為v2v,則下列敘述何者正確? (A)abcd均向右運動,則迴路感應電動勢為LBv (B)abcd均向左運動,則迴路感應電動勢為LBv (C)ab向右運動,cd向左運動,則迴路感應電動勢為3LBv (D)ab,向左運動,cd向右運動,則迴路感應電動勢為3LBv (E)abcd均向右運動,產生的感應電動勢方向與ab向左,cd向右運動所產生者方向相同。


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Posted in 電磁感應與冷次定律.

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