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  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 is the admittance, measured in siemens
- G is the conductance, measured in siemens
- is the imaginary unit
- B is the susceptance, measured in siemens
The magnitude of admittance is given by:
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