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 cubic block of aluminum rests on a wooda47ljvpu8re8 75ejp b en table in a region whtuepjt cf-r; 3u3 l3/jere a uniform electric fcp;e3uf 3u/l j -rt3tjield is directed straight upward. What can be said concerning the charge on 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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