Definition:Weber (Unit)
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Definition
The weber is the SI unit of magnetic flux.
It is defined as the total magnetic flux density through a $1 \ \mathrm m^2$ area of space.
That is, it is equal to the magnetic flux that, when linking a current loop, produces an electromotive force of $1$ volt as it is reduced to zero at a uniform rate in $1$ second.
Symbol
- $\mathrm {Wb}$
The symbol for the weber is $\mathrm {Wb}$.
Its $\LaTeX$ code is \mathrm {Wb}
.
Base Units
The SI base units of the weber are:
- $\mathrm {Wb} := \mathrm {kg} \, \mathrm m^2 \, \mathrm s^{-2} \mathrm A^{-1}$
where:
- $\mathrm {kg}$ denotes kilogram
- $\mathrm m$ denotes metre
- $\mathrm s$ denotes seconds (of time)
- $\mathrm A$ denotes amperes.
This arises from its derivation as the $\mathrm T \, \mathrm m^2$ tesla-square metre.
Source of Name
This entry was named for Wilhelm Eduard Weber.
Sources
- 1969: J.C. Anderson, D.M. Hum, B.G. Neal and J.H. Whitelaw: Data and Formulae for Engineering Students (2nd ed.) ... (previous) ... (next): $1.$ Units and Abbreviations: $1.2$ SI units $(2)$ Derived units
- 1976: Ralph J. Smith: Circuits, Devices and Systems (3rd ed.) ... (previous) ... (next): Chapter $1$: Electrical Quantities: Definitions and Laws: Definitions: Table $1$-$2$: Important Derived Quantities
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): weber
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): weber