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IEVref:121-11-03ID:
Language:enStatus: Standard
Term: electric constant
Synonym1: permittivity of vacuum
[Preferred]
Synonym2:
Synonym3:
Symbol: ε0
Definition: scalar constant ε0 linking the electric quantities and the mechanical quantities, obtained from the relation

F= 1 4π ε 0 | Q 1 Q 2 | r 2 MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaiaadAeacqGH9aqpdaWcaaqaaiaaigdaaeaacaaI0aacdaGae8hWdaNaeqyTdu2aaSbaaSqaaiaab+gaaeqaaaaakiabgwSixpaalaaabaWaaqWaaeaacaWGrbWaaSbaaSqaaiaaigdaaeqaaOGaamyuamaaBaaaleaacaaIYaaabeaaaOGaay5bSlaawIa7aaqaaiaadkhadaahaaWcbeqaaiaaikdaaaaaaaaa@4827@

based on the Coulomb law in vacuum, where F is the magnitude of the force between two particles with electric charges Q1 and Q2 respectively, placed at a distance r apart

NOTE 1 – In vacuum, the product of the electric constant and the electric field strength E is equal to the electric flux density D:

D = ε0E

NOTE 2 – The electric constant is related to the magnetic constant μ0 and to the speed of light in vacuum c0 by the relation

ε0μ0c02 = 1

NOTE 3 – The value of the electric constant is exactly equal to

10 7 4π×299 792  458 2 m -3 kg -1 s 4 A 2 =8,854 187 817  pF /m MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaamaalaaabaGaaGymaiaaicdadaahaaWcbeqaaiaaiEdaaaaakeaacaaI0aacdaGae8hWdaNaey41aqRaaGOmaiaaiMdacaaI5aGaaeiiaiaaiEdacaaI5aGaaGOmaiab=bcaGiaaisdacaaI1aGaaGioamaaCaaaleqabaGaaGOmaaaaaaGccaqGTbWaaWbaaSqabeaajugqbiaac2cacaaMi8+ccaaIZaaaaOGaam4AaiaadEgadaahaaWcbeqaaKqzafGaaiylaiaayIW7liaaigdaaaGccaWGZbWaaWbaaSqabeaacaaI0aaaaOGaamyqamaaCaaaleqabaGaaGOmaaaakiabg2da9iaaiIdacaGGSaGaaGioaiaaiwdacaaI0aGaaeiiaiaaigdacaaI4aGaaG4naiaabccacaaI4aGaaGymaiaaiEdacqGHMacVdaWcgaqaaiaabchacaqGgbaabaGaaeyBaaaaaaa@6299@


Publication date:1998-08
Source:705‑03‑01 MOD
Replaces:
Internal notes:2015-12-02: <sub>o</sub> corrected to <sub>0</sub>. JGO

2017-06-02: Cleanup - Remove Attached Image 121-11-031.gif

2017-06-02: Cleanup - Remove Attached Image 121-11-032.gif
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