The process of producing electric dipoles, oriented along the direction of the field, is called polarization in the dielectric. Dielectric polarization is also the displacement of charged particles under the action of the external electric field. So it is useful to make circuits, capacitors etc. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essay VARIOUS POLARIZATION PROCESSES: Ion polarization. Orientative polarization. Electronic polarization. Interfacial/space charge polarization. Ionic polarization: is observed when different atoms that make up a molecule share their electrons asymmetrically, and cause the cloud of electrons is attracted towards the atom with the strongest bond, the atoms acquire charges of opposite polarity and an external field acting on these net charges will tend to change the equilibrium positions of the atoms themselves, leading to ionic polarization. The net dipole moment is zero in the absence of an external electric field. This type of polarization generally occurs in ionic crystals (such as NaCl, KCl and LiBr). Orientational Polarization: When an ionic bond is formed between two molecules through the transfer of some valence electrons, a permanent dipole moment will arise in them. This permanent dipole moment is equal to the product of the charges of the transferred valence electrons and the interatomic distance between them. In the presence of an electric field E, molecules carrying a permanent dipole moment will orient themselves to align along the direction of the electric field E. This process is called dipolar or orientational polarization. This occurs only in dipolar materials that possess permanent dipole moments. Electronic polarization: arises due to the displacement of the positive nucleus and negatively charged electrons in the opposite direction, when an electric field is applied. It ultimately creates a dipole moment in the dielectric material. Exhibited by monatomic gases. Proportional to the volume of atoms and is independent of temperature.Interfacial/space charge polarization: It is present in dielectric materials that contain charge carriers that can migrate some distance through most of the material (via diffusion, etc.). Such distortion appears to an external observer as an increase in sample capacitance and may be indistinguishable from the actual increase in dielectric permittivity. Please note: this is just a sample. Get a custom paper from our expert writers now. Get a Custom Essay In dielectric materials, localized charges (ions and vacancies, or electrons and holes) can jump from one site to another, creating hopping polarization. Similarly, the separation of positive and negative mobile charges under an electric field can produce interfacial polarization.