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 separated by 1/ 9 mrjv9aq+ ykjsj7jabbf -j6 tard/i8;dqhjb/0s ( x distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m clfrjbbtas/di d 0(b ;6hjxq-/8oser 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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