RELATION BETWEEN ELECTRIC SUSCEPTIBILITY AND DIELECTRIC CONSTANT
ELECTRIC SUSCEPTIBILITY: When a dielectric material is placed in an electric field. It becomes electrically polarized. For most material the polarization is proportional to electric field. Electrical Susceptibility is denoted by X_e which is dimensionless.
DIELECTRIC CONSTANT: When dielectric material is introduced between the plates of a parallel plate capacitor, the capacitance of the capacitor increases.