Tesla (unit)

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The tesla (symbol T) is the SI derived unit used to measure magnetic fields. Tesla can be measured in different ways; for example, one tesla is equal to one weber per square meter.

The tesla was first defined in 1960 by the General Conference on Weights and Measures (CGPM).[1] It was named in honor of the physicist, electrical engineer, and inventor, Nikola Tesla.

Definitions[change | change source]

Using only the seven base SI units, the definition of a tesla is:

\mbox{T} 
= \dfrac{\mbox{kg}}{\mbox{A} \cdot \mbox{s}^2}

Using other SI derived units, a tesla is also equal to:

\mbox{T} 
= \dfrac{\mbox{V} \cdot \mbox{s}}{\mbox{m}^{2}}
= \dfrac{\mbox{N}}{\mbox{A} \cdot \mbox{m}}
= \dfrac{\mbox{Wb}}{\mbox{m}^{2}}
= \dfrac{\mbox{kg}}{\mbox{C} \cdot \mbox{s}}
= \dfrac{\mbox{N} \cdot \mbox{s}}{\mbox{C} \cdot \mbox{m}}

The units used are:

A = ampere
C = coulomb
kg = kilogram
m = meter
N = newton
s = second
T = tesla
V = volt
Wb = weber

A tesla is also equal to 10,000 (104) gauss in the CGS system of units.

Example values[change | change source]

References[change | change source]

  1. International Bureau of Weights and Measures (1960), Système International d'Unités (International System of Units), http://www.bipm.org/en/CGPM/db/11/12/. 11th session, Resolution 12.
  2. Taylor, Lucas (23 November 2011). "Superconducting Magnet in CMS". European Laboratory for Particle Physics. http://cms.web.cern.ch/news/superconducting-magnet. Retrieved 5 April 2013.
  3. "ITER - the way to new energy". http://www.iter.org/mach/magnets. Retrieved 19 April 2012.
  4. Berry, M.V. and A.K. Geim (1997). "Of flying frogs and levitrons". European Journal of Physics 18 (4). http://www.ru.nl/publish/pages/561854/frog-ejp.pdf. Retrieved 5 April 2013.