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範例:多質點電荷的電場(二)二維空間

邊長為a的正三角形三頂點各置固定電荷+q、+q、-q，則此三角形重心處之電場強度大小為何?


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Posted in 電場與電力線.

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By admin – 2010 年 03 月 01 日

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