Coulomb
The coulomb, symbol C, is the SI unit of electric charge, and is defined in terms of the ampere: 1 coulomb is the amount of electric charge carried by a current of 1 ampere flowing for 1 second. It is also about 6.241506×1018 times the charge of an electron. It is named after Charles-Augustin de Coulomb (1736 - 1806).
A wrong definition
It is sometimes incorrectly said that a coulomb is defined as Avogadro's number of electrons; this is completely wrong. Just as the ampere and second were defined well before the electron's charge was known, the kilogram was defined well before the mass of the amu was known. Neither value has anything to do with the other.
SI electricity units
| SI electricity units Edit (http://www.mywiseowl.com/index.php?title=Template:SI_electricity_units&action=edit) | |||
|---|---|---|---|
| SI Base unit | |||
| Name | Symbol | Quantity | Notes |
| ampere | A | Current | |
| SI Derived units | |||
| Name | Symbol | Quantity | Notes |
| volt | V | Potential difference | |
| ohm | Ω | Resistance, Impedance, Reactance | |
| farad | F | Capacitance | |
| henry | H | Inductance | |
| siemens | S | Conductance, Admittance, Susceptance | =Ω−1 |
| coulomb | C | Electric charge | |
| ohm · metre | Ω · m | Resistivity | |
| siemens per metre | S / m | Conductivity | |
| henry per metre | H /m | Permeability | μ |
| farad per metre | F / m | Permittivity | ε |
| reciprocal farad | F−1 | Elastance | =F−1 |
See also
cs:Coulomb
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fr:Coulomb (unité)
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hu:Coulomb (egység)
nl:Coulomb
ja:クーロン
pl:Kulomb
pt:Coulomb
ru:Кулон
sl:Coulomb
fi:Coulombi
sv:Coulomb
zh:库仑 (单位)