Admittance

In electrical engineering, the admittance (Y) is the inverse or reciprocal of the impedance (Z). The SI unit of admittance is the siemens. Oliver Heaviside coined the term in December 1887.

Related Topics:
Electrical engineering - Inverse - Reciprocal - Impedance - SI - Siemens - Oliver Heaviside - 1887

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:Y = Z^{-1} = 1/Z ,

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where

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:Y is the admittance, measured in siemens

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:Z is the impedance, measured in ohms

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Just as impedance is complex resistance, and the conductance G is the inverse G = 1/R of resistance R, admittance is also complex conductance.

Related Topics:
Complex - Resistance - Conductance

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Likewise, admittance is made up of a real part (the conductance), and an imaginary part (the susceptance B), shown by the equation

Related Topics:
Real - Imaginary - Susceptance - Equation

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:Y = G + j B ,

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The magnitude of admittance is given by:

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:left | Y ight | = sqrt {G^2 + B^2} ,!

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where

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:G is the conductance, measured in siemens

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:B is the susceptance, measured in siemens

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