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 electrosc zh)i0,li gv/v/ zci)gope is groundedx u2fzo1ldxwz8y4;-fm,9p1 phko ep0 briefly while a positively charged glass rod is held near it. After the glass rod is removed, t1 x,zzow91 p8hplm 2-p;fd yxe0fkuo4he 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
| 
