A capacitor is kept connected to the battery and a dielectric slab is inserted between the plates. During this process
A
No work is done
B
Work is done at the cost of the energy already stored in the capacitor before the slab is inserted
C
Work is done at the cost of the battery
D
Work is done at the cost of both the capacitor and the battery
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C
Work is done at the cost of the battery
c (c) In this process capacity increases, so battery supplies additional charge to capacitor.
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