What is Weber (unit)?
In [[physics]], the '''weber''' (symbol: Wb; {{IPAc-en|ˈ|v|eɪ|b|ər}}, {{IPAc-en|ˈ|w|ɛ|b|ər}}, or {{IPAc-en|ˈ|w|iː|b|ər}}) is the [[SI]] [[physical unit|unit]] of [[magnetic flux]]. A ''flux density'' of one Wb/m<sup>2</sup> (one weber per square meter) is one [[tesla (unit)|tesla]]. The weber is named for the [[Germany|German]] physicist [[Wilhelm Eduard Weber]] (1804–1891). == Definition == The weber may be defined in terms of [[Faraday's law of induction|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]] (produce an electric [[potential difference]] of one volt across two open-circuited terminals). Officially, <blockquote>Weber (unit of magnetic flux) — The weber is the magnetic flux which, linking a circuit of one turn, would produce in it an electromotive force of 1 volt if it were reduced to zero at a uniform rate in 1 second.<ref> {{cite web |year = 1946 |title = CIPM, 1946: Resolution 2 / Definitions of Electrical Units |url = http://www.bipm.org/en/CIPM/db/1946/2/ |work = [[International Committee for Weights and Measures]] (CIPM) Resolutions |publisher = [[International Bureau of Weights and Measures]] (BIPM) |accessdate = 2008-04-29 }}</ref></blockquote> In [[SI base unit]]s, the dimensions of the weber are (kg·m<sup>2</sup>)/(s<sup>2</sup>·A). Many times, the weber is expressed in terms of other derived units as the Tesla-square meter (T·m<sup>2</sup>), volt-seconds (V·s), or joules per ampere (J/A). :1 Wb = 1 V·s = 1 T·m<sup>2</sup> = 1 J/A = 10<sup>8</sup> Mx ([[maxwell (unit)|maxwells]]). == References == <references/> {{SI units}} [[Category:SI derived units]] [[Category:Magnetism]]