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Electrical conductance is reciprocal of electrical resistance. SI derived unit of conductance is siemens (symbol S, equal to 1/Ω).
Electrical conductance should not be confused with electrical conductivity, which is material specific feature and reciprocal of electrical resistivity.
Conductance G is related to susceptance B and admittance Y by the equation:
Y = G + j B <math>
The magnitude of admittance is given by:
Y = \sqrt {G^2 + B^2} <math>