Units
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 |