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