NON POLAR DIELECTRICS:
- Are made of non-polar molecules.
- The center of mass of positive charges coincides with the center of mass of the negative charges, in the molecule.
- In its normal state (i.e., in the absence of any external force, esp electric field), each molecule has zero dipoles and
- has a symmetric shape.
POLAR DIELECTRICS:
- Are made of polar molecules.
- The center of mass of positive charges does not coincide with the center of mass of the negative charges, in the molecule.
- In its normal state (i.e., in the absence of any external force, esp electric field), each molecule has some intrinsic permanent dipole and
- has an asymmetric shape.
The dielectric constant is the ratio of the permittivity of a substance to the permittivity of free space. It is an expression of the extent to which a material concentrates electric flux, and is the electrical equivalent of relative magnetic permeability.