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
is the speed of light and
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