|Physical quantity (s)||Electrical capacitance|
|system||International system of units|
|In SI units|
|Named after||Michael Faraday|
|Derived from||Coulomb , volt|
The majority of capacitors used in electrical engineering have values that are considerably smaller than a farad, so that information with the aid of SI prefixes such as microfarad (µF = 10 −6 F), nanofarad (nF = 10 −9 F) and Picofarads (pF = 10 −12 F) are encountered.
The term Farad was introduced by the two English electrical engineers Josiah Latimer Clark and Charles Tilston Bright in honor of the English physicist Michael Faraday and proposed in 1861 as a unit for the electrical charge . In 1881, however , the International Electricity Congress established the farad as the unit for electrical capacity and the coulomb (after the French physicist Charles Augustin de Coulomb ) as the unit for electrical charge.