MHT CET 2026 Physics question

The function of a dielectric in a capacitor is to

(A)reduce the plate area of the capacitor.
(B)to decrease the capacitance.
(C)reduce the effective potential on plates.Correct
(D)increase the effective potential on plates.

Answer: (C)

Solution

When a dielectric slab is inserted in a capacitor, it gets polarised and produces an internal field opposite to the applied field. The net field between the plates is reduced from to , so for the same charge the potential difference (effective potential) across the plates is reduced to . Since $C =

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Question ID VK-098592