UnitsΒΆ

The units for dielectric properties and associated quantities are summarized in the table below. The units for the dielectric permittivity reflect the fact that it relates a field (\(\vec E\)) to a flux (\(\vec D\)). On the other hand, the relative permittivity is unitless, as is the dielectric susceptibililty.

Property

Symbol

Units

Electric Field

\(\vec E\)

N/C or V/m

Displacement Current

\(\vec D\)

A/m \(\!^2\)

Electric Polarization

\(\vec P\)

A/m \(\!^2\)

Dielectric Permittivity

\(\varepsilon\)

F/m

Dielectric Susceptibility

\(\chi_e\)

Unitless

Relative Permittivity

\(\varepsilon_r\)

Unitless