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Area Electromagnetism / Electromagnetic concepts and quantities

IEV ref121-11-27

Symbol
U

en
voltage
(electric) tension
scalar quantity equal to the line integral of the electric field strength E along a specific path linking two points a and b:

U ab = r a r b Edr MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbb a9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9 q8qiLsFr0=vr0=vr0db8meaabaGacmGadiWaaiWabaabaiaafaaake aacaWGvbWaaSbaaSqaaGGaaiaa=fgacaWFIbaabeaakiabg2da9maa pehabaaccmGaa4xraiabgwSixlaa=rgacaGFYbaaleaacaGFYbWaaS baaWqaaiaa=fgaaeqaaaWcbaGaa4NCamaaBaaameaacaWFIbaabeaa a0Gaey4kIipaaaa@48DB@

where ra and rb are the position vectors for a and b, respectively, and dr is the vector line element

Note 1 – In the case of an irrotational field strength, the voltage is independent of the path and equal to the negative of the electric potential difference between the two points:

U ab =( V b V a ) MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbbjxAHXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeqabiGaciGacaqadmaadaqaaqaaaOqaaiaadwfadaWgaaWcbaacbaGaa8xyaiaa=jgaaeqaaOGaeyypa0JaeyOeI0YaaeWaaeaacaWGwbWaaSbaaSqaaiaa=jgaaeqaaOGaeyOeI0IaaGjbVlaadAfadaWgaaWcbaGaa8xyaaqabaaakiaawIcacaGLPaaaaaa@4207@

Note 2 – The name "voltage", commonly used in the English language, is an exception from the principle that a quantity name should not refer to any name of unit.


fr
tension (électrique), f
grandeur scalaire égale à la circulation du champ électrique E le long d'un chemin donné reliant deux points a et b:

U ab = r a r b Edr MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbb a9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9 q8qiLsFr0=vr0=vr0db8meaabaGacmGadiWaaiWabaabaiaafaaake aacaWGvbWaaSbaaSqaaGGaaiaa=fgacaWFIbaabeaakiabg2da9maa pehabaaccmGaa4xraiabgwSixlaa=rgacaGFYbaaleaacaGFYbWaaS baaWqaaiaa=fgaaeqaaaWcbaGaa4NCamaaBaaameaacaWFIbaabeaa a0Gaey4kIipaaaa@48DB@

ra et rb sont les rayons vecteurs de a et b respectivement, et dr est l'élément vectoriel d'arc

Note 1 – Dans le cas d'un champ électrique irrotationnel la tension électrique est indépendante du chemin et égale à l'opposé de la différence de potentiel électrique entre les deux points:

U ab =( V b V a ) MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbbjxAHXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeqabiGaciGacaqadmaadaqaaqaaaOqaaiaadwfadaWgaaWcbaacbaGaa8xyaiaa=jgaaeqaaOGaeyypa0JaeyOeI0YaaeWaaeaacaWGwbWaaSbaaSqaaiaa=jgaaeqaaOGaeyOeI0IaaGjbVlaadAfadaWgaaWcbaGaa8xyaaqabaaakiaawIcacaGLPaaaaaa@4207@

Note 2 – Le nom "voltage", couramment utilisé en langue anglaise, constitue une exception au principe selon lequel le nom d'une grandeur ne devrait pas faire référence à un nom d'unité.


ar
جهد،جهد (كهربائي)

de
elektrische Spannung, f
Spannung, f

es
tensión (eléctrica)

fi
jännite

it
tensione (elettrica)

ja
電圧
U, (記号)

no
nb spenning

nn spenning

pl
napięcie elektryczne
napięcie

pt
tensão (eléctrica)

ru
(электрическое) напряжение

sv
elektrisk spänning
(elektrisk) spänning

Publication date: 2002-01
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