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Encyclopedia > Electrical conductance

Electrical conductance is the reciprocal of electrical resistance. It is a measure of how easily electricity flows along a certain path through an electrical element. The SI derived unit of conductance is the siemens (formerly referred to as the reciprocal ohm or mho). Oliver Heaviside coined the term in September 1885. In mathematics, the reciprocal, or multiplicative inverse, of a number x is the number which, when multiplied by x, yields 1. ... Electrical resistance is a measure of the degree to which an electrical component opposes the passage of current. ... Lightning strikes during a night-time thunderstorm. ... It has been suggested that Electrical component be merged into this article or section. ... SI derived units are part of the SI system of measurement units and are derived from the seven SI base units. ... The siemens (symbol: S) is the SI derived unit of electric conductance. ... Ohm may refer to: The scientist Georg Ohm. ... Oliver Heaviside (May 18, 1850 – February 3, 1925) was a self-taught English engineer, mathematician and physicist who adapted complex numbers to the study of electrical circuits, developed techniques for applying Laplace transforms to the solution of differential equations, reformulated Maxwells field equations in terms of electric and magnetic... 1885 (MDCCCLXXXV) is a common year starting on Thursday of the Gregorian calendar (or a common year starting on Saturday of the 12-day slower Julian calendar). ...


Electrical conductance should not be confused with conduction, which is the mechanism by which charge flows, or with conductivity, which is a property of a material. Electrical conduction is the movement of electrically charged particles through matter. ... Electrical conductivity is a measure of a materials ability to conduct an electric current. ...


Relation to other quantities

As mentioned, conductance is related to resistance by:

G = frac{1}{R} = frac{I}{V} ,

where:

G is the electrical conductance,
R is the electrical resistance,
I is the electric current,
V is the voltage.

(Note: this is not true where the impedence is complex) Electrical resistance is a measure of the degree to which an electrical component opposes the passage of current. ... Electric current is by definition the flow of electric charge. ... International safety symbol Caution, risk of electric shock (ISO 3864), colloquially known as high voltage symbol. ...


Furthermore, conductance is related to susceptance and admittance by the equation: In electrical engineering, the susceptance (B) is the imaginary part of the admittance. ... In electrical engineering, the admittance (Y) is the inverse of the impedance (Z). ...

Y = G + j B ,

or

G = Re(Y) ,

where:

Y is the admittance,
j is the imaginary unit,
B is the susceptance.

In electrical engineering, the admittance (Y) is the inverse of the impedance (Z). ... In mathematics, the imaginary unit (sometimes also represented by the Latin or the Greek iota) allows the real number system to be extended to the complex number system . ... In electrical engineering, the susceptance (B) is the imaginary part of the admittance. ...

See also

... Electrical conductivity is a measure of a materials ability to conduct an electric current. ...

External links

  • Conductance, Susceptance, and Admittance

  Results from FactBites:
 
Herguth - TOC - Electrical Conductivity/ Dielectric Strength (453 words)
The unit of electrical conductivity involves the reciprocal of resistance (1/ohm or mho) and a distance, and is mho cm-1.
Electrical conductivity and dielectric breakdown voltage of oils are important in lubricated components subjected to stray or self-generated electric currents.
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Electrical conductivity - Wikipedia, the free encyclopedia (690 words)
Electrical conductivity or specific conductivity is a measure of a material's ability to conduct an electric current.
The conductivity of a semiconductor is generally intermediate, but varies widely under different conditions, such as exposure of the material to electric fields or specific frequencies of light, and, most important, with temperature and composition of the semiconductor material.
In metals, electrical conductivity decreases with increasing temperature, whereas in semiconductors, electrical conductivity increases with increasing temperature.
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