These units measure electric flux, which Primel terms “electric influence”, typically symbolized, which is the ratio of “influence” (surface integral of force) to “quantity of electricity” (electric charge).
\begin{aligned}
\displaystyle \Phi_\mathrm{E} = \iint_S \mathbf{E} \cdot \mathrm{d}\mathbf{A} = \overline{\varepsilon}_0 Q
\end{aligned} |
where
is a closed Gaussian surface
is the electric field (“electric force”, i.e., force per charge)
is an infinitessimal surface normal area vector on surface
is the total electric charge (“quantity of electricity”) contained within the surface
is the vacuum “elastivity” (reciprocal of vacuum “capacitivity” also known as vacuum permittivity)