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 electron and a proton are b(+yegrga ( /yx7 rl:fsepaap*o9 h/+xdv+ l4kf0nvp 4hz qrated by a distance of 1.0 m. What happens to the size of the force on the proton if the el*zvd4qvk o+f 4 p9n hxpl+ha/0ectron is moved 0.50 m closer to the proton?
A. It increases to 4 times its original value.
B. It increases to 2 times its original value.
C. It decreases to one-half its original value.
D. It decreases to one-fourth its original value.
参考答案: A
本题详细解析:
暂无
| 
