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]
An originally neutral electroscop(5ht*i.zs :nsnmz 4 oye is grounded briefly while a d3hq n dm- y1ymc2m+i6positively charged glass rod-id6+ ynd32 h y1qmcmm is held near it. After the glass rod is removed, the electroscope
A. remains neutral.
B. is negatively charged.
C. is positively charged.
D. could be either positively or negatively charged, depending on how long the contact with ground lasted.
参考答案: B
本题详细解析:
暂无
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