Definition:Capacitance/Unit
Definition
The SI unit of capacitance is the farad $\mathbf F$.
In the CGS unrationalised electromagnetic system, the unit of capacitance is the abfarad $\mathrm {abF}$.
In the CGS unrationalised electrostatic system, the unit of capacitance is the statfarad $\mathrm {statF}$.
Farad
The farad is the SI unit of capacitance.
It is defined as being the amount of capacitance of a capacitor between the plates of which an electric potential of $1$ volt appears when it stores $1$ coulomb of electric charge:
- $1 \, \mathrm F = 1 \, \mathrm C \, \mathrm V^{-1}$
that is, $1$ coulomb per volt.
Abfarad
The abfarad is the CGS unrationalised electromagnetic unit of capacitance.
It is defined as being the amount of capacitance of a capacitor between the plates of which an electric potential of $1$ abvolt appears when it stores $1$ abcoulomb of electric charge.
Statfarad
The statfarad is the CGS unrationalised electrostatic unit of capacitance.
It is defined as being the amount of capacitance of a capacitor between the plates of which an electric potential of $1$ statvolt appears when it stores $1$ statcoulomb of electric charge.