|Physical quantity (s)||Magnetic flux density|
|system||Electromagnetic CGS unit system , Gaussian CGS unit system|
|In SI units|
|In CGS units|
|Named after||Carl Friedrich Gauss|
Gauss (in Switzerland or under English-speaking influence also Gauss ; unit symbols : Gs , G ; after Carl Friedrich Gauß ) is the unit of the magnetic flux density B in the electromagnetic CGS system and in the Gaussian CGS system :
In Germany, the Gauss has not been a legal unit in metrology since 1970 , but is still used , especially in astrophysics . Instead, the legal unit of magnetic flux density in the EU and Switzerland is Tesla , the corresponding unit in the International System of Units (SI):
In parallel with Gauss, the unit gamma existed for the magnetic flux density :
The Gauss is often confused with the Gaussian CGS unit of the magnetic field strength H, the Oersted , which can also be represented as in the Gaussian system of units and in electromagnetic CGS systems . The reason for this formal equality is that magnetic flux density and magnetic field strength in the above-mentioned unit systems are of the same dimension (unlike in the SI, where the two quantities always differ by the magnetic permeability or the magnetic field constant as a proportionality factor ).
"Gauss" as the name of the electromagnetic CGS unit for the magnetic field strength was specified in 1900 at the 5th International Electricity Congress in Paris. As a result of a misunderstanding, the American delegates assumed that “Gauss” had been agreed as the name for the electromagnetic CGS unit of magnetic flux density . This ambiguity was cleared up in favor of the American view at the IEC meeting in Stockholm and Oslo in 1930 .
In 1933, at a meeting in Paris, the IEC stipulated that 1 cm −1/2 g 1/2 s −1 as the electromagnetic CGS unit of the magnetic field strength should be called Oersted.
The unit symbol "Gs" for Gauss was established by the IEC in 1935 at a conference in Scheveningen .
- Ulrich Stille: Measuring and calculating in physics . 2nd Edition. Vieweg, Braunschweig 1961, p. 212 .