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 isz,9x0di zg-oxd;j+ yx enclosed in a hollow metallic sphere iha5qmo-xl . h0:u(lf that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow(llo0 :a.fi5h u-hxm q 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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