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

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admin 发表于 2024-2-6 09:50:02 | 显示全部楼层 |阅读模式
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]
A point charge of +Q is placed at the center of a square, and7zdpt19sjmm;cgmq e5u*uue u ,e*+g( a se4dft jegz22 m:ci:yg 6m;g0yv 7qu,ab cond point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N ;db,c6jg4iu :zavmy2em7g 2yt:fq0 gacts 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 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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