In electrostatics, the polarization P is the dipole moment per unit volume.
Objects which have non-zero dipole moment are known as dielectrics. If a time varying electric field is applied the polarization also changes resulting in a polarization current density Jb
Jb=dP/dt
The degree to which an object acquires polarization depends on the applied electric field E and the electric susceptibility χe.
P=εOχeE
The total electric flux density D in a dielectric is
D=εOE+P
The polarization is analagous to the magnetization in magnetics