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MHT CET Physics question

PhysicsElectrostatic Potential and CapacitanceMHT CET

Two condenser of capacities 2C and C are joined in parallel and charged up to potential V. The battery is removed and the condenser C is filled completely with a medium of dielectric constant k. The P.D. across the capacitor will now be

Answer: (A)

Solution

The charge is conserved and the new capacitance is , so ;

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Question ID VK-075406