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範例:電場與導體球靜電平衡[82日大]

一不帶電之中空金屬球殼外徑為R，中心位於O點。今在球殼外距球心距離為d處放置一點電荷-Q(Q>0)，則金屬球上會產生感應電荷（如右圖所示）。所有感應電荷在球心O點處產生之電場其量值及方向為(A)KQ/R2,方向向右(B)KQ/R2方向向左(C)KQ/d2方向向右(D)KQ/d2方向向左(E)0。【81物理資優競試】【82日大】


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Posted in 歷屆物理考題, 電場與電力線.

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By admin – 2010 年 03 月 05 日

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