Electrical conductance
(Redirected from Electric conductance)
Electrical conductance is the reciprocal of electrical resistance. The SI derived unit of conductance is the siemens (symbol S, equal to 1/Ω).
Electrical conductance should not be confused with electrical conductivity, which is material specific feature and reciprocal of electrical resistivity.
Conductance, G, is related to susceptance, B, and admittance, Y, by the equation:
- <math>Y = G + j B \,<math>
where:
- Y is the admittance, measured in siemens
- G is the conductance, measured in siemens
- <math>j = \sqrt{-1}<math> is the imaginary unit
- B is the susceptance, measured in siemens
The magnitude of admittance is given by:
- <math>\left | Y \right | = \sqrt {G^2 + B^2}<math>
SI units
| SI electromagnetism units | |||
|---|---|---|---|
| Name | Symbol | Dimensions | Quantity |
| ampere (SI base unit) | A | A | Current |
| coulomb | C | A·s | Electric charge, Quantity of electricity |
| volt | V | J/C = kg·m2·s−3·A−1 | Potential difference |
| ohm | Ω | V/A = kg·m2·s−3·A−2 | Resistance, Impedance, Reactance |
| ohm metre | Ω·m | kg·m3·s−3·A−2 | Resistivity |
| farad | F | C/V = kg−1·m−2·A2·s4 | Capacitance |
| farad per metre | F/m | kg−1·m−3·A2·s4 | Permittivity |
| reciprocal farad | F−1 | kg1·m2·A−2·s−4 | Elastance |
| siemens | S | Ω−1 = kg−1·m−2·s3·A2 | Conductance, Admittance, Susceptance |
| siemens per metre | S/m | kg−1·m−3·s3·A2 | Conductivity |
| weber | Wb | V·s = kg·m2·s−2·A−1 | Magnetic flux |
| tesla | T | Wb/m2 = kg·s−2·A−1 | Magnetic flux density |
| ampere per metre | A/m | m−1·A | magnetic induction |
| ampere-turns per weber | A/Wb | kg−1·m−2·s2·A2 | Reluctance |
| henry | H | V·s/A = kg·m2·s−2·A−2 | Inductance |
| henry per metre | H/m | kg·m·s−2·A−2 | Permeability |
| (dimensionless) | - | - | Magnetic susceptibility |
External links
Categories: Physics stubs | Physical quantity | Electricity