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範例:導線旋轉切割磁力線[76夜大]

在一均勻磁場中B中，有一長為3L/2的金屬直棒POQ，以O為圓心，垂直於磁場，以等角速度w轉。若OP=L，則(A)OP間的感應電動勢為L2wB/2(B)OQ間的感應電動勢為L2wB/8(C)QP間的感應電動勢為5L2wB/8(D)QP間的感應電動勢為3L2wB/8(E)若OQ長變為L，OP仍為L，則QP間的感應電動勢為L2wB[76夜大]


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Posted in 歷屆物理考題, 電磁感應與冷次定律.

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By admin – 2010 年 05 月 14 日

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