# Difference between revisions of "Electric constant/Definition"

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imported>John R. Brews (subscripts & superscripts) |
imported>John R. Brews (rewrite; the name electric constant does not apply to e.s.u.) |
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A [[physical constant]] in the [[International System of Units]] (SI) relating capacitance to area with an exact value {{nowrap|''ε<sub>0</sub>''}} = {{nowrap|10<sup>7</sup>/(4πc<sub>0</sub><sup>2</sup>) F/m}}, ''c<sub>0</sub>'' being the defined value for the [[speed of light]] in [[classical vacuum]] in the SI units. | |||

## Revision as of 17:41, 27 March 2011

A physical constant in the International System of Units (SI) relating capacitance to area with an exact value *ε _{0}* = 10

^{7}/(4πc

_{0}

^{2}) F/m,

*c*being the defined value for the speed of light in classical vacuum in the SI units.

_{0}