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 34d, where ′d′ is the separation between the plates of the parallel plate capacitor. The new capacitance (C′) in terms of the original capacitance (C0) is given by the following relation: