Statcoulomb
| statcoulomb | |
|---|---|
| Unit system | Gaussian, CGS-ESU |
| Unit of | electric charge |
| Symbol | Fr, statC, esu |
| Derivation | dyn1/2⋅cm |
| Conversions | |
| 1 Fr in ... | ... is equal to ... |
| CGS base units | 1 cm3/2⋅g1/2⋅s−1 |
| SI (charge) | ≘ ~ 3.33564×10−10 C |
| SI (flux) | ≘ ~ 2.65×10−11 C |
The statcoulomb (statC), franklin (Fr), or electrostatic unit of charge (esu) is the unit of measurement for electrical charge used in the centimetre–gram–second electrostatic units variant (CGS-ESU) and Gaussian systems of units. In terms of the Gaussian base units, it is
1 statC = 1 dyn1/2⋅cm = 1 cm3/2⋅g1/2⋅s−1.
That is, it is defined so that the proportionality constant in Coulomb's law using CGS-ESU quantities is a dimensionless quantity equal to 1.