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MHT CET 2022 Physics question

PhysicsElectrostatic Potential and CapacitanceMHT CET 2022

If the charge on the capacitor is increased by 2 coulomb, the energy stored in it increases by 21%. The original charge on the capacitor is

Answer: (C)

Solution

Energy stored (C fixed). A 21% increase gives

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Question ID VK-095733