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A capacitor is charged by using a batter...

A capacitor is charged by using a battery which is then disconnected. A dielectric slab is then slipped between the plates, which results in

A

Reduction of charge on the plates and increase of potential difference across the plates

B

Increase in the potential difference across the plate, reduction in stored energy, but no change in the charge on the plates

C

Decrease in the potential difference across the plates,reduction in the stored energy, but no change in the charge on the plates

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
C
When a dielectric slab inserted
`C =kC_0`
Q = constant , Q = CV
`Cuarr V darr , V = V_0/k`
and `U=Q^2/(2C),` U also decreases `U = U_0/k`
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