# Express Dielectric Constant Of A Medium In Terms Of Capacitance What Is Its SI Unit.

The dielectric constant of a medium is defined as the ratio of the capacitance of the capacitor when filled with a medium to the capacitance of the same capacitor when the medium is removed.

K = $$\frac{C_\;{medium}}{C_{0}}$$

The dielectric constant of a medium has no unit.

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