Magnetic Units: Tesla, Gauss, and Ørsted

There are two quantities that describe any given magnetic field:

Magnetic induction, B

and

Magnetic intensity, H

In the cgs (centimeter, gram, second) system of units B equals H, but in the international SI system they are identical up to a constant.

In the international SI system magnetic induction is measured in Tesla (T) [N A-1 m-1]. The corresponding cgs unit is Gauss. The relation between Tesla and Gauss is: 1T=10 000 Gauss.

In the international system magnetic field is measured in Amperes per meter (A/m). In the cgs system, the corresponding measure is Øersted.  Their relation is 1 A/m = 4π/103 Oersted.

 

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