POLAR MATERIAL AND NON POLAR MATERIALS -- POLAR AND NON POLAR DIELECTRIC
NON POLAR DIELECTRIC: A Non Polar Molecule, the molecules are usually dielectric and composed of two atoms of the same type. They posses symmetrical structure i.e, their positive nuclei is surrounded by negative electrons cloud.
POLAR DIELECTRIC: In Polar Dielectric Material, the molecules are composed of two or more different atoms having permanent dipole moment because the centre of gravity of their positive charge and that of their negative charges are permanently separated by small distance. The molecular dipole in polar dielectric is randomly oriented so that net dipole moment is zero.