MHT CET 2025 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 capacity of capacitance
(D)to reduce the plate area of the capacitor

Answer: (A)

Solution

When a dielectric slab of constant is introduced between the plates, the induced surface charges create a field opposite to the applied field, so the net field and the potential difference between the plates are reduced: (for fixed charge). Because

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Question ID VK-102944