statvolt | |
---|---|

Unit system | CGS-ESU and gaussian |

Unit of | electric potential, electric potential difference (voltage), and electromotive force |

Symbol | statV |

Named after | Alessandro Volta |

In CGS base units | g^{1/2}·cm^{1/2}/s ^{[1]}^{:26} |

Conversions | |

1 statV in ... | ... corresponds to ... |

SI derived units | c_{cgs} 10^{−8} volt=299.792458 volt ^{[Note 1]} |

CGS-EMU | c_{cgs} abvolt |

The **statvolt** is a unit of voltage and electrical potential used in the CGS-ESU and gaussian systems of units. In terms of its relation to the SI units, one statvolt corresponds to exactly *c*_{cgs} 10^{−8} volt,^{[Note 1]} i.e. to 299.792458 volts.^{[2]}

The statvolt is also defined in the CGS system as 1 erg / statcoulomb.^{[2]}

It is a useful unit for electromagnetism because, in a vacuum, an electric field of one statvolt per centimetre has the same energy density as a magnetic field of one gauss. Likewise, a plane wave propagating in a vacuum has perpendicular electric and magnetic fields such that for every gauss of magnetic field intensity there is one statvolt/cm of electric field intensity.^{[2]}

In the CGS-EMU system, the unit of voltage is the abvolt.

## Notes

- ^
^{a}^{b}The dimensionless constant*c*_{cgs}= 2.99792458×10^{10}is numerically equal to the magnitude of the speed of light when the latter is expressed in cm/s.

## References

**^**Gyllenbok, Jan (2018).*Encyclopaedia of Historical Metrology, Weights, and Measures: Volume 1*. Birkhäuser. ISBN 978-3-319-57598-8.- ^
^{a}^{b}^{c}Purcell, Edward (2011).*Electricity and Magnetism*(Second ed.). Cambridge: Cambridge University Press. pp. 474–475. ISBN 9781107013605.