# 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.

## 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

## 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 ?
The behavior of photosynthetic rates observed in the present study is directly related to stomatal conductance, because water availability and accumulation of internal C[O.
32 kg da-1) was obtained from silver grey mulch treatment with the highest leaf chlorophyll content, photosynthesis rate and leaf stomal conductance.
Study of large particle impacts on the shape of the sensor conductance trace indicates that only particles of a size on the order of the distance between sensing electrodes have a substantial impact on the sensor conductance.
However, these are called 'stable' measurements, meaning, upon placement of the electrode upon the skin, the meter swings upward to a peak conductance value and rests stable in a steady state, relatively indefinitely.
In the second step, the balanced current [mathematical expression not reproducible] is decomposed into four orthogonal components namely; active, reactive, scattered conductance and scattered susceptance currents by treating each phase individually.
In conclusion, taken together our data indicate that: a) increased leaf conductance, and in particular gm, are major players in favoring photosynthesis over photorespiration, especially in sclerophyllous plants; b) Q.
Continuous changes in stomatal conductance in leaves were measured with the AP4 leaf porometer (Delta-T Devices Ltd, Cambridge, GB) in intervals of 1-20 min.
Simon Clarke, owner of Nacarat, who came third in the Racing Post Chase, was one of those taking part and his heart rate rose to 127 beats per minute during the feature race, while his skin conductance results showed significant levels of excitement, particularly in the final furlong.
9), we get a complete expression for conductance which depends on the angles 0,9, and on the barrier height, [V.
When measuring Raw, through the use of the body plethysmogragh, the method of patient breathing, whether using normal breathing or through panting, can have a significant effect on the Raw and subsequent specific airway conductance values obtained and these differences can be of even greater significance in small children.

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