Statvolt
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 [ edit ]
- ^ ^{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 [ edit ]
- ^ 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.