ABSTRACT
Dielectric materials refer to those having the basic electric Property Of being Polarized in the Presence of an electric Field and having an electrostatic field within Them under the state of polarisation .(polarisation here refers to the molecular aligment along the direction of the applied electric field . ) Also synosymusly referred to as an electrical insulation material the dielectric has the ability to prevent the leakage of electrical charges from the body on which it is deployed .In general electrical insulation materials which possess dielectric properties offer a very hight resistance to the passage of electric current under the action of an applied direct - current voltage .Hence such materials differ distincty in basic electric properties from those classified as electric conductors such as metals .