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]
A positive object touches a neutral electwsnb(j h2vp*.o n/0 l ysbs7f-roscope, and the leaves separate. Then 0wn/ybfvhsosps n-lb.27(j*(ly4+t mf xca1 a negative object is brought near the electroscope,amf y+1(l 4tcx but does not touch it. What happens to the leaves?
A. They separate further.
B. They move closer together.
C. They are unaffected.
D. cannot be determined without further information
参考答案: B
本题详细解析:
暂无
| 
