(a) Non-polar
molecules, (b) Polar molecules Rationalised 2023-24
Electrostatic Potential
and Capacitance
67
every volume element Dv of the slab has a dipole moment
P Dv in the direction of the field The volume element Dv  is
macroscopically small but contains a very large number of
molecular dipoles Anywhere inside the dielectric, the
volume element Dv has no net charge (though it has net
dipole moment)