A capacitor of capacitance C is initially charged to a potential difference of V volt. Now it is connected to a battery of 2V with opposite polarity. The ratio of heat generated to the final energy stored in the capacitor will be
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Question

A capacitor of capacitance C is initially charged to a potential difference of V volt. Now it is connected to a battery of 2V with opposite polarity. The ratio of heat generated to the final energy stored in the capacitor will be

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G1 Physics · Accepted Answer

Use P = VI = I²R = V²/R and H = I²Rt, together with the series/parallel current-voltage relations. The result matches B (2.25).