In a parallel-plate capacitor, the region between the plates is filled by a dielectric slab. The capacitor is charged from a cell and then disconnected from it. The slab is now taken out. (a) The potential difference across the capacitor is reduced. (b) The potential difference across the capacitor is increased. (c) The energy stored in the capacitor is reduced. (d) No work is done by an external agent in taking the slab out.

In a parallel-plate capacitor, the region between the plates is filled

1.	In a parallel-plate capacitor, the region between the plates is filled by a dielectric slab. The capacitor is charged from a cell and then disconnected from it. The slab is now taken out. (a) The potential difference across the capacitor is reduced. (b) The potential difference across the capacitor is increased. (c) The energy stored in the capacitor is reduced. (d) No work is done by an external agent in taking the slab out.
Answer» Correct Answer is: (b)

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