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MHT CET Physics question

PhysicsElectrostatic Potential and CapacitanceMHT CET

A capacitor of capacity 4 F charged to 50 volts is connected parallel to another capacitor of 2 F charged to 100V, with plates of like charges connected together. What is the total energy before & after connection?

Answer: (B)

Solution

Before: J; the common potential is

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Question ID VK-075424