MHT CET 2022 Physics question

The dielectric slab is introduced between the plates of a parallel plate charged capacitor. Which one of the following quantities will not change?

(A)The charge on the capacitorCorrect
(B)The potential difference between the plates
(C)The energy stored in the capacitor
(D)The electric field between the plates of a capacitor

Answer: (A)

Solution

The capacitor is charged and (as the question implies) isolated from the battery, so no charge can flow on or off the plates: stays constant. Inserting a dielectric of constant increases the capacitance . Then $V =

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Question ID VK-097059