Permeability of free space: Difference between revisions
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<onlyinclude>The '''permeability of free space''', '''μ<sub>0</sub>''', is a physical constant used often in [[electromagnetic force|electromagnetism]]. It is taken to have the exact value of 4π x 10<sup>-7</sup> N/A<sup>2</sup> ([[newton]]s per [[ampere]] squared).<ref name=hyp>Hyperphysics. (August 28, 2015). ''Electric field'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elefie.html</ref> It is connected to the energy stored in a [[magnetic field]]</onlyinclude>, see [http://hyperphysics.phy-astr.gsu.edu/hbase/electric/engfie.html#c1 Hyperphysics] for specific equations. | <onlyinclude>The '''permeability of free space''', '''μ<sub>0</sub>''', is a physical constant used often in [[electromagnetic force|electromagnetism]]. It is taken to have the exact value of 4π x 10<sup>-7</sup> N/A<sup>2</sup> ([[newton]]s per [[ampere]] squared).<ref name=hyp>Hyperphysics. (August 28, 2015). ''Electric field'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elefie.html</ref> It is connected to the [[energy]] stored in a [[magnetic field]]</onlyinclude>, see [http://hyperphysics.phy-astr.gsu.edu/hbase/electric/engfie.html#c1 Hyperphysics] for specific equations. | ||
It is related to the [[speed of light]] by the equation | It is related to the [[speed of light]] by the equation | ||
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where | where | ||
*<m>c</m> is the speed of light and | *<m>c</m> is the [[speed]] of [[light]] and | ||
*<m>\epsilon_0</m> is the [[permittivity of free space]]. | *<m>\epsilon_0</m> is the [[permittivity of free space]]. | ||
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==References== | ==References== | ||
{{reflist}} | {{reflist}}[[Category:Uploaded]] | ||
[[category: Mark edit]] | |||
Revision as of 20:08, 17 September 2015
The permeability of free space, μ0, is a physical constant used often in electromagnetism. It is taken to have the exact value of 4π x 10-7 N/A2 (newtons per ampere squared).[1] It is connected to the energy stored in a magnetic field, see Hyperphysics for specific equations.
It is related to the speed of light by the equation
where
- <m>c</m> is the speed of light and
- <m>\epsilon_0</m> is the permittivity of free space.
Visit Hyperphysics for more information on this constant.
References
- ↑ Hyperphysics. (August 28, 2015). Electric field [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elefie.html