unit of magnetic flux in the International System of Units (SI), defined as the amount of flux that, linking an electrical circuit of one turn (one loop of wire), produces in it an electromotive force of one volt as the flux is reduced to zero at a uniform rate in one second. It was named in honour of the 19th-century German physicist Wilhelm Eduard Weber and equals 108 maxwells, the unit used in the centimetre–gram–second system.
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