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]
An originally neutralin 67eq-yc(kc eleg)z2gbeab q:0f vs*;r4cd - gbctroscope is grounded briefly while a positively charged glass rod is held near it. :b v*2gd )brsbz;q -e4fag0gc 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
| 
