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)a 4ej3b .bsqw is placed at the center of a square, and a sen(o0t31(y3d: wjkg+ m ssujk ccond 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 3( ko3ycjsgnw j(01tkdm:+suthe center. What is the magnitude of the force that acts on the center charge if a third charge of -Q is placed 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

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