For changing the capacitance of a given parallel plate capacitor, a dielectric material of dielectric constant K is used, which has the same area as the plates of the capacitor. The thickness of the dielectric slab is $\frac{3}{4} d$, where ' $d$ ' is the separation between the plates of parallel plate capacitor. The new capacitance ( $C$ ') in terms of original capacitance ( $C_0$ ) is given by the following relation :