Physics Unit16: Electric Charge and Electric Field (id: 0594f0465)

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 point charge of +Q is placedsr0vg0ljkdl6fg:na2 bai9 (l f (l5y+ a n;asnd-*5omat the center of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on the positive charge at the center. What is the magnitude of the force that acts on the center charge if a third charge of -Q is place5*m a;sna-n odd at the lower-left corner?

A. zero
B. $2.8 \; N$
C. $4.0 \; N$
D. $5.3 \; N$


参考答案:  B


本题详细解析: 暂无

微信扫一扫，分享更方便