SAT Subject Physics Practice Question 66: Answer and Explanation

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Question: 66

3. The figure below shows three point charges, all positive. If the net electric force on the center charge is zero, what is the value of ?

A.
B.
C.
D.
E.

Correct Answer: C

Explanation:

If the net electric force on the center charge is zero, the electrical repulsion by the +2q charge must balance the electrical repulsion by the +3q charge

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