IEVref:705-03-01ID:
Language:enStatus: Obsolete
Term: electric constant
Synonym1: absolute permittivity of vacuum
[Preferred]
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Definition: a scalar constant ε0 such that, in vacuum, its product by the electrical field vector E → MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbba9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9q8qiLsFr0=vr0=vr0db8meGabiGacmGadiWaaiGabaabaiGafaaakeaadaWhcaqaaiaadweaaiaawEniaaaa@3C0E@ is equal to the electric flux density vector D → MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbba9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9q8qiLsFr0=vr0=vr0db8meGabiGacmGadiWaaiGabaabaiGafaaakeaadaWhcaqaaiaadweaaiaawEniaaaa@3C0E@ :

D → = ε 0 E → MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbba9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9q8qiLsFr0=vr0=vr0db8meaabaGacmGadiWaaiGabaabaiGafaaakeaadaWhcaqaaiaadseaaiaawEniaiabg2da9iabew7aLnaaBaaaleaaciGGVbaabeaakmaaFiaabaGaamyraaGaay51Gaaaaa@425F@

NOTE 1 – In the International System of units (SI), the value of ε0 is (4πc02)−1 107 farad per metre, approximately 8,85 pF/m, where c0 is the numerical value of the velocity of electromagnetic waves in vacuum.

NOTE 2 – The electric constant is related to the magnetic constant μ0 by ε0μ0c02 = 1.


Publication date:1995-09
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