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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 form the cell

B

Some charge is returned to the cell.

C

The potential differences 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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