If the relative permittivity for any substance is $80$,then its electric susceptibility is . . . . . . .

The dielectric constant for a metal is

Define dielectric constant.

Choose the correct relation between polarisation $P$ and electric susceptibility $\chi_{e}$ of a dielectric material. ($E =$ electric field)

$A$ dielectric slab of dielectric constant $K$ is placed between the plates of a parallel plate capacitor carrying charge $q$. The induced charge $q^{\prime}$ on the surface of the slab is given by

Which of the following statements is false in the case of polar molecules?