There are four types of dielectric polarization.Electronic Polarization – Electronic polarization of dielectrics is the outcome of displacement of negative and positive charges in the dielectric field. Ionic Polarization –The ionic polarization takes place only in those dielectric materials where atoms are having ionic bonds. The distance between the separated atoms due to the external electric field is larger. Orientation Polarization – This polarization occurs even without the electric field. The polar dielectric gets random when the external field is applied and thus the dipole moment is zero.It is also affected by the thermal agitation occurring in dipolar molecules, which results in the cancellation of the net dipole moment when no electric field is applied. Space Charge Polarization - It occurs due to the accumulation of an electric charge at an interface between two materials, such as between electrodes connected to a dielectric substance. The electric field causes an imbalance in charge because of the insulating properties of the dielectric material. To respond to the applied field, the ions disperse over a considerable distance.