Question
A charge $3 q$ is at the origin, and a charge $-2 q$ is on the positive $x$-axis at $x=a$. Where would you place a third charge so it would experience no net electric force?
Step 1
First, we need to find the possible positions for the third charge. Since the charges $3q$ and $-2q$ are on the x-axis, the third charge must also be on the x-axis to experience no net force in the y-direction. Show more…
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