题目内容

金属球A与同心球壳B组成电容器,球A上带电荷q, 壳B上带电荷Q, 测得球与壳间电势差为UAB , 可知该电容器的电容值为

A. q/UAB ;
B. Q/UAB ;
C. (q+Q)/UAB ;
D. (q+Q)/(2UAB).

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