Tesla (unit)
SI unit of magnetic flux density
The tesla (symbol: T) is the unit of magnetic flux density (B) (also called magnetic B-field) in the International System of Units (SI).
One tesla is equal to one weber per square metre. The unit was announced during the General Conference on Weights and Measures in 1960 and is named in honour of Serbian-American electrical and mechanical engineer Nikola Tesla, upon the proposal of the Slovenian electrical engineer France Avčin. As with every SI unit named after a person, its symbol is upper case (T) but the name of the unit is written in sentence case (tesla).
Definition
A particle, carrying a charge of one coulomb (C), and moving perpendicularly through a magnetic field of one tesla, at a speed of one metre per second (m/s), experiences a force with magnitude one newton (N), according to the Lorentz force law. That is,
T
=
N
⋅
s
C
⋅
m
.
{\displaystyle \mathrm {T={\dfrac {N{\cdot }s}{C{\cdot }m}}} .}
Expressed in SI base units, 1 tesla is:
T
=
k
g
A
⋅
s
2
,
{\displaystyle \mathrm {T={\dfrac {kg}{A{\cdot }s^{2}}}} ,}
where A is ampere, kg is kilogram, and s is second.
In terms of other SI derived units
As an SI derived unit, the tesla can also be expressed in terms of other units. For example, a magnetic flux of 1 weber (Wb) through a surface of one square meter is equal to a magnetic flux density of 1 tesla. That is,
T
=
W
b
m
2
.
“Tesla (unit)” enters the record as sI unit of magnetic flux density. Crown Archives preserves that source wording while asking what Tesla, unit and magnetic can confirm, complicate or overturn.
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