electric constant

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electric constant

n
(General Physics) the permittivity of free space, which has the value 8.854 187 × 10–12 farad per metre. Symbol: εo Also called: absolute permittivity
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where j = [square root of (-1)], [epsilon]' and [epsilon]" are the real and imaginary parts of [[epsilon].sup.*], respectively, [epsilon] is the relative permittivity, [kappa] is the effective conductivity, [[epsilon].sub.0] = 8.8542 x [10.sup.-12] F/m is the absolute permittivity of vacuum, and [omega] = 2[pi]f (where f is the frequency) is the angular frequency of the applied electric field.
Therefore, the parameters of this medium (medium 2) are absolute permittivity [[epsilon].sub.2] = [[epsilon].sub.r2] [[epsilon].sub.0] = 42.807[[epsilon].sub.0], absolute permeability [[mu].sub.2] = [[mu].sub.0], and conductivity [[sigma].sub.2] = 0.6463 S/m [2].
[epsilon] (epsilon) is the absolute permittivity of the dielectric, which is a measure of the electrostatic energy stored within it and therefore dependent on the material.