本题目来源于试卷: Electric Field and Electric Induction，类别为 美国物理杯赛(Physics Bowl)
[单选题]
04.15: A positively charged object is broug uh; f .j1qsdlpv; 26chht near but not in contact with th q5l dokp v3/kl4y 0lf0e top of an uncharged gold leaf electroscope. T 04 l f50yp/ldk qk3lvohe experimenter then briefly touches the electroscope with a finger. The finger is removed, followed by the removal of the positively charged object. What happens to the leaves of the electroscope when a negative charge is now brought near but not in contact with the top of the electroscope?
A. they remain uncharged
B. they move farther apart
C. they move closer together
D. they remain positively charged but unmoved
E. they remain negatively charged but unmoved
参考答案: B
本题详细解析:
暂无
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