Admittance
In electrical engineering,
admittance is a measure of how easily a circuit or device will allow a current to flow. It is defined as the inverse of impedance. The SI unit of admittance is the siemens. Oliver Heaviside coined the term
admittance in December 1887. Admittance is defined as where
Y is the admittance, measured in siemens
Z is the impedance, measured in ohms The synonymous unit mho, and the symbol ℧, are also in common use. Resistance is a measure of the opposition of a circuit to the flow of a steady current, while impedance takes into account not only the resistance but also dynamic effects. Likewise, admittance is not only a measure of the ease with which a steady current can flow, but also the dynamic effects of the material's susceptance to polarization: where ▪ is the admittance, measured in siemens. ▪ is the conductance, measured in siemens. ▪ is the susceptance, measured in siemens. ▪...