本题目来源于试卷: Physics Unit16: Electric Charge and Electric Field，类别为 国际高中通用物理
[单选题]
A cubic block of aluminum rests . be3y movkb)o2y4 1uion a wood;ptc2s00 z*9uawarv nx hm 1a,gki3;ien table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge x 3nm0i;apvt*2r,asi ;c 0g z 9ua1hwkon the block's top surface?
A. The top surface is charged positively.
B. The top surface is charged negatively.
C. The top surface is neutral.
D. The top surface's charge cannot be determined without further information.
参考答案: A
本题详细解析:
暂无
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