Write the relation between $\vec{P}$ and $\vec{E}$ for a linear isotropic dielectric.

(N/A) For a linear isotropic dielectric,the polarization $\vec{P}$ is directly proportional to the external electric field $\vec{E}$.
The relation is given by:
$\vec{P} = \chi_e \vec{E}$
where $\chi_e$ is the electric susceptibility of the dielectric material.