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Admittance Y, measured in siemens, is defined as the inverse of impedance Z, measured in ohms: Y ≡ 1 Z {\displaystyle Y\equiv {\frac {1}{Z}}} 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 (known as reactance ).
Another application of admittance in geophysics takes atmospheric pressure as the input and measures changes in the gravitational field as the output. In such case admittance is measured in μGal/mbar. These units convert according to 1 Gal = 0.01 m/s 2 and 1 bar = 100 kPa, so in SI units the measurement would be in units of;
The indefinite form of the noun is identical in the nominative and accusative cases, being the uninflected form of the noun in the singular, and the form noted above in the plural.
Admittance parameters or Y-parameters (the elements of an admittance matrix or Y-matrix) are properties used in many areas of electrical engineering, such as power, electronics, and telecommunications. These parameters are used to describe the electrical behavior of linear electrical networks.
In electronics, an immittance Smith chart can be created by overlaying both the impedance and admittance grids, which is useful for cascading series-connected with parallel-connected electric circuits. This allows for the visualization of changes in impedance or admittance in the system caused by components of either the series or parallel circuit.
Admittance may refer to: Admittance, a measure of how easily a circuit allows an electric current to flow; Admittance (geophysics), the small effects of atmospheric pressure on gravity; Thermal admittance, a measure of the ability of a material to transfer heat (see thermal conductivity)
Retrieved from "https://en.wikipedia.org/w/index.php?title=Electrical_admittance&oldid=666606101"This page was last edited on 12 June 2015, at 10:08
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