MHT CET 2024 Physics question

The function of dielectric in a capacitor is

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

Answer: (A)

Solution

When a dielectric slab is placed between the plates, it gets polarised and produces an internal field opposite to the applied field. The net field, and therefore the effective potential difference between the plates, is reduced: . For the same charge ,

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Question ID VK-094963