Question

Define the term polarization of a dielectric and write the expression for a linear isotropic dielectric in  terms of electric field.

Answer 1

Net dipole moment per unit volume induced in dielectric is called polarization. It is represented by P.
P = χ_eE 
P = Polarisation
 χ_e → Electrical succeptibility 
E = External electric field.

Answer 2

Dipole moment per unit volume of a polarized dielectric is known as the polarization of a dielectric. It is denoted by the letter P for the linear isotropic dielectric. 

The polarisation of a linear isotropic dielectric,`"P" = "x"epsilon_@"E"` 
Where E is the net electric field from the effects of both free and bound charges.