作者chuo11 (草之摆)
看板TransPhys
标题[考古] 94中山第4题
时间Fri Jul 3 07:47:32 2009
A parallel-plate capacitor has charge Q and plates of area A.What force acts on one
plate to attract it toward the other plate?
(A)Q^2/εA
(B)2Q^2/εA
(C)Q^2/2εA
(D)Q^2/3εA
(E)3Q^2/εA
请问是哪一个
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