# conductance

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## 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.
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

## 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 series
McGraw-Hill Concise Encyclopedia of Physics. © 2002 by The McGraw-Hill Companies, Inc.

## 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)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## 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.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
###Potential conductance index (PCI)###Operating stomatal conductance (gs; mol H2O m-2s-1)
This was probably due to the reduced stomatal conductance, which was restricted by the intensification of the soil osmotic effect caused by the composition of the treated domestic wastewater accumulated throughout the cotton cycle.
For evaluation of the formation constant from molar conductance (A) vs [C.sub.l]/[C.sub.m] mole ratio data, the KINFIT program was also used.
This includes the method of determining the effective electron temperature using amplitudes of the observed conductance fluctuations.
To find an expression for unbalanced current component [mathematical expression not reproducible], the nth harmonic conductance ([G.sub.l,n]) and nth harmonic susceptance ([B.sub.l,n]) values seen from l=a, b and c phases of the load are written as:
Hypertonia: These points exhibit conductance above 70 (to 100) on the meter scale.
Similarly, the selection of conductance values in circuit can be examined in order of obtaining a gyrator which is not ideal, ([G.sub.11] [not equal to] 0, [G.sub.22] [not equal to]0).
Five flag leaves from each treatment were measured for leaf photosynthesis rate (A, [micro]mol C[O.sub.2] [m.sup.-2][s.sup.-1]), transpiration rate (E, mmol [H.sub.2]O [m.sup.-2][s.sup.-1]) and stomatal conductance ([g.sub.s], mol C[O.sub.2][m.sup.-2][s.sup.-1]) using the portable photosynthesis system LI-6400 XT at DAT 107.
Key Words: Propionic acid 1-Propanol Conductance Dielectric Constant Walden Product.
In our model we are taking into account the postsynaptic conductance of the previous neuron as well which becomes the input signal for our presynaptic neuron.

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