Medium
Three point charges $+q$, $+2q$, and $+Q$ are placed at the three vertices of an equilateral triangle. If the potential energy of the system of three charges is zero, the value of $Q$ in terms of $q$ is
- A$Q=-\frac{2q}{3}$
- B$Q=-\frac{1}{3}q$
- C$Q=\frac{3q}{2}$
- D$Q=\frac{q}{2}$
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