Tesla (unit)

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This article is about the SI unit. For the inventor, see Nikola Tesla.
For other uses, see Tesla (disambiguation).

The tesla (symbol T) is the SI derived unit of magnetic field (specifically magnetic flux density). The tesla is equal to one weber per square metre and was defined in 1960[1] in honor of inventor, scientist and electrical engineer Nikola Tesla.

Contents

[edit] Definition

<math>\mathrm{1\, T = 1\,\frac{V\cdot s}{m^2} = 1\,\frac{N}{A\cdot m} = 1\,\frac{Wb}{m^2} = 1\,\frac{kg}{A\cdot s^2} = 1\,\frac{kg}{C\cdot s}}</math>
This SI unit is named after Nikola Tesla. As with all SI units whose names are derived from the proper name of a person, the first letter of its symbol is uppercase (T). But when an SI unit is spelled out, it should always be written in lowercase (tesla), unless it begins a sentence or is the name "degree Celsius".
— Based on The International System of Units, section 5.2.

[edit] Conversions

1 tesla is equivalent to:

  • 10,000 (or 104) gauss (G), used in CGS system. Thus, 10G = 1mT (1 millitesla)
  • 1,000,000,000 (or 109) gammas (γ), used in geophysics. Thus, 1γ = 1nT (nanotesla)

[edit] Examples

Image:Small small IMG 0836.jpg
The strongest (non-pulsed) magnet in the world is located in Tallahassee, Florida, USA.
picoteslas
nanoteslas
  • In outer space the magnetic field is between 0.1 and 10 nanoteslas (10−10 T and 10−8 T)
microteslas
  • Earth's magnetic field at latitude of 50° is 58 µT (5.8×10−5 T) and on the equator at a latitude of 0° is 31 µT (3.1×10−5 T)
milliteslas
  • In a sunspot, the magnetic field is about 150 mT
teslas
kiloteslas
  • Strongest (pulsed) magnetic field ever obtained (with explosives) in a laboratory (VNIIEF in Sarov, Russia, 1998), 2.8 kT [8]
megateslas
gigateslas
  • On a magnetar, 0.1 to 100 gigateslas (108 to 1011 T)
terateslas
  • Maximum theoretical field strength for a neutron star, and therefore the upper bound thus far for any known phenomenon, 1013 T (10 terateslas)

[edit] References

  1. ^ sizes.com - details of SI units
  2. ^ Surprises from the Edge of the Solar System. NASA (2006-09-21).
  3. ^ Smith, Hans-Jørgen. Magnetic resonance imaging. Medcyclopaedia Textbook of Radiology. GE Healthcare. Retrieved on 2007-03-26.
  4. ^ Frog defies gravity.
  5. ^ World's Most Powerful Magnet Tested Ushers in New Era for Steady High Field Research. National High Magnetic Field Laboratory.
  6. ^ Laboratory sets high magnetic field records. LANL (2006-08-31).
  7. ^ One-of-a-kind magnet open for science. PhysOrg.com (2006-10-25).
  8. ^ With record magnetic fields to the 21st Century. IEEE Xplore.
ast:Tesla (unidá)

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