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 separa6;f kdxew z/y*dreh-1ted ns,lfcc7mue00s )j3k7c4 fcw by a distance of 1.0 m. What happens to the size of the force on the proton if the0 k7ue ccfw ,4l3c )07nmsscjf electron 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
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