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Physics Unit16: Electric Charge and Electric Field (id: 57c03210b)

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admin 发表于 2024-1-18 05:13:13 | 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 国际高中通用物理

[单选题]
Two 0.20-g metal spheres are hung from a common point by nonconducting t cdpp1;yz;b s)hrea)xv .mb 3lkgkh)u3 7bzds which arekx7bhgu .3bl3) k)mzv 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

A. $10 \; nC$
B. $15 \; nC$
C. $20 \; nC$
D. $25 \; nC$


参考答案:  C


本题详细解析: 暂无

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