Gauss (unit)

The gauss (symbol: G or Gs) is a legacy CGS unit of magnetic flux density, which was superseded by the tesla. One gauss is defined as one maxwell per cm2 (Mx/cm2), which equates to 10-4 tesla, and is therefore a small unit. This is one of the reasons for its stubborn persistence in some scientific fields and its common occurrence in the literature.

One area in which it continues to be widely applied is in MRI safety, whereby a 5 gauss line is demarcated around the magnet in the scanning room to show the region of risk to close by electronic devices that may be affected by the field, e.g. cardiac pacemakers

Terminology

As for all eponymous units of measurement when the unit is written out in full it is not capitalized, but when shortened to its symbol it is capitalized.

History and etymology

It is named after German mathematician and physicist Karl Friedrich Gauss (1777-1855) 2.

Physics and Imaging Technology: MRI
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Article information

rID: 58936
Section: Physics
Synonyms or Alternate Spellings:
  • G (unit of magnetism)
  • CGS unit of magnetic flux density
  • Gs (unit of magnetism)

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