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Question

A capacitors is charged to store an energy U. The charging battery is disconnected. An identical capacitor is now connected to the first capacitor in parallel. The energy in each of the capacitors is

A
U2
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B
3U2
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C
U
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D
U4
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Solution

The correct option is B U2
After the battery is disconnected, we have conservation of charge and also energy is equal to q22×C i.e U2
So the answer comes as U2.

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