Physics Unit16: Electric Charge and Electric Field (id: 146c09db1)

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]
Charge +2q is placed at theje. a0c;a wsm3 origin and charge -q is placed at x = 2a. Where caao 47.ifdw smy*)l z3wn a third positive chargeoaz*4is7 m.3yldw) wf +q be placed so that the force on it is zero?

A. $3.4 \; a$
B. $6.8 \; a$
C. $8.6 \; a$
D. $9.3 \; a$


参考答案:  B


本题详细解析: 暂无

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