本题目来源于试卷: Physics Unit16: Electric Charge and Electric Field，类别为 通用国际物理
[单选题]
A positive point charge is enclose.7g u:ybd7der d in a hollow metallic sphere that is ygpwc, ji+,kl5+ry g4grounded. As compared to the cask,cy+ glyi,j4w5rg p+ e without the hollow sphere, the electric field at a point directly above the hollow sphere has
A. diminished to zero.
B. diminished somewhat.
C. increased somewhat.
D. not changed.
参考答案: A
本题详细解析:
暂无
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