A parallel-plate capacitor is connected across a battery. Now, keeping the battery connected, a dielectric slab is inserted between the plates. In this process,
A
no work is done
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B
work is done by the battery and the stored energy increases
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C
work is done by the external agent and the stored energy decreases
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D
work is done by the battery as well as external agent but the stored energy does not change
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Solution
The correct option is B work is done by the battery and the stored energy increases Work is done by the battery and the stored energy increases.