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The **siemens** (S), once known as the mho ([math]\mho[/math])(Ohm spelled backwards), is the SI unit of electrical conductance. It's equal to Ω^{-1}. Electrical conductance, *G*, is the reciprocal of resistance (*R*):

[math]G = \frac{1}{R}[/math]

Electrical conductance measures how easily electricity flows through electrical components for a given voltage difference. Generally, people think in terms of resistances rather than electrical conductance, although neither is more fundamental. This is particularly true in the case of Ohm's law.

For more on the siemens, please consult Dr. Rowlett's unit dictionary, and his article on the mho.

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Bethel Afework, Allison Campbell, Kailyn Stenhouse, Jason Donev

Last updated: June 4, 2018

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