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Weber (unit)



In physics, the weber (symbol: Wb; IPA: /ˈveɪbɚ, ˈwiːbɚ/) is the SI unit of magnetic flux. It is named after the German physicist Wilhelm Eduard Weber (1804 - 1891) and was established by the IEC in 1930 [1].

Definition

SI multiples for weber (Wb)
Submultiples Multiples
Value Symbol Name Value Symbol Name
10–1 Wb dWb deciweber 101 Wb daWb decaweber
10–2 Wb cWb centiweber 102 Wb hWb hectoweber
10–3 Wb mWb milliweber 103 Wb kWb kiloweber
10–6 Wb µWb microweber 106 Wb MWb megaweber
10–9 Wb nWb nanoweber 109 Wb GWb gigaweber
10–12 Wb pWb picoweber 1012 Wb TWb teraweber
10–15 Wb fWb femtoweber 1015 Wb PWb petaweber
10–18 Wb aWb attoweber 1018 Wb EWb exaweber
10–21 Wb zWb zeptoweber 1021 Wb ZWb zettaweber
10–24 Wb yWb yoctoweber 1024 Wb YWb yottaweber
Common multiples are in bold face.

The weber may be defined in terms of Faraday's law, which relates a changing magnetic flux through a loop to the electric field around the loop. A change in flux of one weber per second will induce an electromotive force of one volt.

In SI base units, the dimensions of the weber are \dfrac{\mbox{kg} \cdot \mbox{m}^2}{\mbox{s}^2 \cdot \mbox{A}}. In derived units, they are volt-seconds (\mbox{V} \cdot \mbox{s}).

The weber is a large unit, equal to 1 T m2 = 108 maxwells.

This SI unit is named after Wilhelm Eduard Weber. As with all SI units whose names are derived from the proper name of a person, the first letter of its symbol is uppercase (Wb). But when an SI unit is spelled out, it should always be written in lowercase (weber), unless it begins a sentence or is the name "degree Celsius".
— Based on The International System of Units, section 5.2.
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Weber_(unit)". A list of authors is available in Wikipedia.
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