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Question

Two condensers, one of capacity C and the other of capacity C2, are connected to a V-volt battery as shown.

A
12CV2
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B
2CV2
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C
12CV2
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D
32CV2
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Solution

The correct option is D 32CV2
Their equivalent capacitance,
Ceq=C+C2=3C2
How, total charge flown through the battery,
Q=CeqV=3VC2
Work done by battery,
W=QV
W=3CV2V=3CV22

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