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]
03.50: A solid uncharged p ad0uf/1k 8/qqimsn0 conduct 9n-shtq.qbj/me 7hz 0ing sphere has radius 3a contains a hollowed spherical region of radius 2a. A point charge +Q shq- /9n0qhj7t bem. z is placed at a position a distance a from the common center of the spheres. What is the magnitude of the electric field at the position r = 4a from the center of the spheres as marked in the figure by P?
A. 0
B. $\frac{3kQ}{16a^{2}}$
C. $\frac{kQ}{9a^{2}}$
D. $\frac{kQ}{16a^{2}}$
E. None of the previous
参考答案: D
本题详细解析:
暂无
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