Dielectric constant

Electric susceptibility: This term refers to the extent to which a material can become polarized when subjected to an external electric field.

Permittivity: Permittivity is a measure of how easily electric fields can penetrate through a material. It is related to the dielectric constant but takes into account other factors such as free charges.

Capacitance: Capacitance is a property that describes how much charge can be stored on an object per unit voltage. It depends on both the geometry and dielectric constant of the medium between two conductors.