Electrical conductance

Electrical conductance is the reciprocal of electrical resistance. It is a measure of how easily electricity flows along a certain path through an object. The SI derived unit of conductance is the siemens (symbol S, equal to 1/Ω; alias the "mho"). Oliver Heaviside [1] coined the term in September 1885.

Electrical conductance should not be confused with conduction, which is the mechanism by which charge flows, or with conductivity, which is a property of a material.

Relation to other quantities

Conductance is related to susceptance and admittance by the equation:

$Y = G + i B \,$

where:

• Y is the admittance, measured in siemens
• G is the conductance, measured in siemens
• $i=\sqrt{-1}$ is the imaginary unit
• B is the susceptance, measured in siemens

The magnitude of admittance is given by:

$\left | Y \right | = \sqrt {G^2 + B^2}$

See also

SI

External links

• Conductance, Susceptance, and Admittance