Fields D.2 Electromagnetic Fields & Potential (id: fae0a8aea)

本题目来源于试卷: Fields D.2 Electromagnetic Fields & Potential，类别为 IB物理学

[单选题]
Two positive charges 1hqaa-t / o7b23u uh*bs(nmvq.t*jxtjyn4gz ( ocq (4jgz r/q6oi3f,$q_1$​ and $q_2$​ are separated by a distance d. A third positive charge q is placed at a distance $\frac{d}{4}$ from $q_1$​ so that the charge q is in equilibrium.


What is the ratio $\frac{q_1}{q_2}$

A. 16
B. 4
C. $\frac{1}{9}$
D. 3


参考答案:  C


本题详细解析:

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