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MHT CET Physics question

PhysicsElectrostatic Potential and CapacitanceMHT CET

Two identical capacitors have the same capacitance C. One of them is charged to potential and the other to . The negative ends of the capacitors are connected together. When the positive ends are also connected, the decrease in energy of the combined system is

Answer: (C),(D)

Solution

The common potential is , so

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Question ID VK-075613