Electrostatic Force and Electric Field (id: 777eb3428)

本题目来源于试卷: Electrostatic Force and Electric Field，类别为 美国物理杯赛(Physics Bowl)

[单选题]
94.08: A point charg-i+ s 4t12m youpag*e+rod,fsrm8komfd00v 2fmlak:y6 wpa ,ct e9aug48v1* e of +4.0 μC is placed on the negative x-axis 0.20 m to the left of the origin, as shown in the accompanying figure. A secu moa0 46:yrdgkkvvf9w,tace1*8f al2 p mm08ond point charge q is placed on the positive x-axis 0.30 mto the right of the origin. The net electric field at the origin is zero. What is q?

A. 9.0 μC
B. 6.0μC
C. 0
D. −6.0 μC
E. −9.0 μC


参考答案:  A


本题详细解析: 暂无

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