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MHT CET 2025 Physics question

PhysicsElectrostatic Potential and CapacitanceMHT CET 2025

Three point charges +Q, +2Q and q are placed at the vertices of an equilateral triangle. The value of charge q in terms of Q, so that electrical potential energy of the system is zero, is given by

Answer: (C)

Solution

Let the side of the triangle be . The total electrostatic potential energy is the sum over the three pairs: .

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Question ID VK-101278