本题目来源于试卷: Gauss Law and Metal in Eclectic Equilibrium，类别为 美国物理杯赛(Physics Bowl)
[单选题]
15.48: Two concentric charged conducting shells are in free space. e(zejk)9d2cz The 1zv-r6n5 mjz 8-ajgbw h)zf8a ls)ui7 outer shell has inner radius 2a and o uj)an-- vrmz5g1 8zl6w8 7 a)sjbz hfiuter radius 3a. The inner shell has radius a. It is known that the electric potential at $r=3a$ is $V_{3a}=\frac{kQ}{3a}$ . If the electric potential $V_a$ at $r=a$ is 0 volts, what is the charge on the inner spherical shell
$Q_in$?
A. $Q_in=-\frac{3}{2}Q$
B. $Q_in=-\frac{2}{3}Q$
C. $Q_in=-\frac{1}{3}Q$
D. $Q_in=-2Q$
E. $Q_in=-\frac{1}{2}Q$
参考答案: B
本题详细解析:
暂无
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