Electrical elastance
Electrical elastance is the inverse of capacitance. The SI unit is the reciprocal farad. Although the term daraf is sometimes used, this is not approved by SI. Electrical inductor-capacitor-resistor circuits can be converted to mass-spring-damper systems. If voltage is taken to be force and current velocity, elastance corresponds to the elastic constant of a spring.
SI electricity units
| SI electromagnetism units edit | |||
|---|---|---|---|
| Name | Symbol | Dimensions | Quantity |
| ampere (SI base unit) | A | A | Current |
| coulomb | C | A新 | Electric charge, Quantity of electricity |
| volt | V | J/C = kg搶2新−3嫂−1 | Potential difference |
| ohm | Ω | V/A = kg搶2新−3嫂−2 | Resistance, Impedance, Reactance |
| ohm metre | Ω搶 | kg搶3新−3嫂−2 | Resistivity |
| watt | W | V嫂 = kg搶2新−3 | Electrical power |
| farad | F | C/V = kg−1搶−2嫂2新4 | Capacitance |
| farad per metre | F/m | kg−1搶−3嫂2新4 | Permittivity |
| reciprocal farad | F−1 | kg1搶2嫂−2新−4 | Elastance |
| siemens | S | Ω−1 = kg−1搶−2新3嫂2 | Conductance, Admittance, Susceptance |
| siemens per metre | S/m | kg−1搶−3新3嫂2 | Conductivity |
| weber | Wb | V新 = kg搶2新−2嫂−1 | Magnetic flux |
| tesla | T | Wb/m2 = kg新−2嫂−1 | Magnetic flux density |
| ampere per metre | A/m | m−1嫂 | magnetic induction |
| ampere-turns per weber | A/Wb | kg−1搶−2新2嫂2 | Reluctance |
| henry | H | Wb/A = V新/A = kg搶2新−2嫂−2 | Inductance |
| henry per metre | H/m | kg搶新−2嫂−2 | Permeability |
| (dimensionless) | χ | - | Magnetic susceptibility |