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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)

ko
전압

ja
電圧
U, (記号)

no
nb spenning

nn spenning

pl
napięcie elektryczne
napięcie

pt
tensão (eléctrica)

ru
(электрическое) напряжение

sr
напон, м јд

sv
elektrisk spänning
(elektrisk) spänning

Publication date: 2002-01
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