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NEET PhysicsClass 12Potential energy of a system of chargesMediumSingle correct

Charges of +1 μC, +2 μC and −3 μC are placed at the corners of an equilateral triangle of side 30 cm in air. What is the electrostatic potential energy of the system? (k = 9 × 10⁹ N m² C⁻²)

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