Question

Define the terms polarization of a dielectric and write its relation with susceptibility.

Answer 1

Both polar or non-polar dielectrics develop a net dipole moment in the presence of an external field. The dipole moment per unit volume is called polarisation and is denoted by P. For linear isotropic dielectrics, The dipole moment per unit volume is called polarisation and is denoted by P. For linear isotropic dielectrics,

`P=chiE`

where χ is electric susceptibility of the dielectric medium