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In a parallel-plate capacitor, the regio...

In a parallel-plate capacitor, the region between the plates is filled by a dielectric slab. The capacitor is connected to a cell and the slab is taken out. Then

A

some charge is drawn from the cell

B

some charge is returned to the cell

C

the potential difference across the capacitor is reduced

D

no work is done by an external agent in taking the slab out

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The correct Answer is:
B
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