conductance


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Related to conductance: Thermal conductance, equivalent conductance, Electrical conductance, specific conductance

conductance

the ability of a system to conduct electricity, measured by the ratio of the current flowing through the system to the potential difference across it; the reciprocal of resistance. It is measured in reciprocal ohms, mhos, or siemens.

Conductance

The real part of the admittance of an alternating-current circuit. The admittance Y of an alternating-current circuit is a complex number given by Eq. (1). (1)  The real part G is the conductance. The units of conductance, like those of admittance, are called siemens or mhos. Conductance is a positive quantity. The conductance of a resistor R is given by Eq. (2). (2) 

In general the conductance of a circuit may depend on the capacitors and inductors in the circuit as well as on the resistors. For example, the circuit in the illustration has impedance at frequency &ohgr; given by Eq. (3) and admittance given by Eq. (4), so that the conductance, given by

(3) 
(4) 
(5) 
Eq. (5), depends on the inductance L as well as the resistance R. See Admittance, Electrical impedance

Circuit with a resistor and inductor in seriesenlarge picture
Circuit with a resistor and inductor in series

conductance

[kən′dək·təns]
(electricity)
The real part of the admittance of a circuit; when the impedance contains no reactance, as in a direct-current circuit, it is the reciprocal of resistance, and is thus a measure of the ability of the circuit to conduct electricity. Also known as electrical conductance. Designated G.
(fluid mechanics)
For a component of a vacuum system, the amount of a gas that flows through divided by the pressure difference across the component.
(thermodynamics)

thermal conductance

The time rate of flow of heat through a unit area of material from one of the faces of the material to the other, for a unit temperature difference between the two faces, under steady-state conditions.
References in periodicals archive ?
In this work, a linear polynomial is fitted to the spatial data and the value and slope of the extrapolated polynomial at the surface is used to estimate the time-wise variation of the thermal contact conductance between two one-dimensional solids with fixed contact.
The temperature measurements within the low pressure side of the recuperator are used to compute the temperature profile of the high pressure stream (as described in the "Experimental Apparatus" section and shown on Figure 2(b)), and the conductance (UA) of the heat exchanger section located between each temperature sensor.
The conductance, G, has been computed numerically as a function of the gate voltage, [V.
It is evident that patients with large lungs will have higher Gaw than patients with smaller lungs and so to make a fair comparison with patients possessing different sized lungs, the Gaw is divided by the thoracic gas volume (VTG), which is comparable to the patient's FRC, to produce specific airway conductance or SGaw which is simply Gaw corrected for lung volume at FRC.
Further, the Ni(II) complexes of six biologically significant amino acids were prepared and their conductance in all the four mediums investigated.
An inverse heat conduction method for determining the periodically time-varying contact conductance between two periodically contacting surfaces is presented by Flach [8].
Ultrasonic, capacitance, pressure, conductance, float and displacer, and sounding reel types.
04 parts per million and a specific conductance of less than 0.
The Leaf Porometer automatically measures stomatal conductance and eliminates human error by picking the end point.
Applications are found in magnetic force microscopy (MFM), conductance and those where the sample has a dependence on the applied field.
The primary method for this is to lower the thermal conductance of the refractory coating (increase the insulation).