Question

Why does the capacitor increases when the medium between the plate is filled with dielectric?

Answer 1

Hey friend here is ur query..
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The capacitance of a set of charged parallel plates is increased by the insertion of a dielectric material. The capacitance is inversely proportional to the electric field between the plates, and the presence of the dielectric reduces the effective electric field. Thus it increases the capacitance.

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Hope this will help you..