Question

Give a brief qualitative explanation based on the behavior of molecules, for the change in capacitance of a capacitor when the space between its plates is filled with a dielectric.

Answer 1

Answer

When the free space or vacuum is available then capacitance of capacitor is given

$C=\frac{\epsilon_0 A}{d}$

When dielectric material is added between plates then capacitance is increased as

$C=\frac{\epsilon_0 \epsilon_r A}{d}$