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 electron and a pro34y-1 )skffk z az/yybton are separated by a distance of 1.0 43:rtp(giws g1c wbk/ m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer to t/:s4 gik w(pr cg1wtb3he 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:
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