# coulomb

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## coulomb

(ko͞o`lŏm) [for C. A. de CoulombCoulomb, Charles Augustin de
, 1736–1806, French physicist. In 1789 he retired from his posts as military engineer and as superintendent of waters and fountains and devoted himself to continuing his scientific research.
], abbr. coul or C, unit of electric chargecharge,
property of matter that gives rise to all electrical phenomena (see electricity). The basic unit of charge, usually denoted by e, is that on the proton or the electron; that on the proton is designated as positive (+e
. The absolute coulomb, the current U.S. legal standard, is the amount of charge transferred in 1 second by a current of 1 ampereampere
, abbr. amp or A, basic unit of electric current. It is the fundamental electrical unit used with the mks system of units of the metric system. The ampere is officially defined as the current in a pair of equally long, parallel, straight wires 1 meter apart that produces
; i.e., it is 1 ampere-second.

## Coulomb

(1) A unit of the quantity of electricity (electric charge) in the International System of Units (SI). It was named in honor of the French physicist C. Coulomb. The abbreviations are k in Russian and C in the international system. One coulomb is the charge carried through the cross section of a conductor in 1 sec by a current of 1 ampere. The relationships between the coulomb and the units of charge in the cgs system of units are as follows: 1 C = 3 X 109 units of the cgs electrostatic (cgs esu) system; 1 C = 0.1 unit of the cgs electromagnetic (cgs emu) system.

(2) The unit of flux of electric displacement (the flux of electric induction) in the SI system of units: 1 C is the electric flux through a closed surface that contains a free charge of 1 C. The relationships between the coulomb and the unit of electric flux in the cgs system of units are as follows: 1 C ≃ 4π X 3 X 109 units of the cgs esu system; 1 C = 0.4π units of the cgs emu system.

## coulomb

[′kü‚läm]
(electricity)
A unit of electric charge, defined as the amount of electric charge that crosses a surface in 1 second when a steady current of 1 absolute ampere is flowing across the surface; this is the absolute coulomb and has been the legal standard of quantity of electricity since 1950; the previous standard was the international coulomb, equal to 0.999835 absolute coulomb. Abbreviated coul. Symbolized C.

## coulomb

the derived SI unit of electric charge; the quantity of electricity transported in one second by a current of 1 ampere.

## Coulomb

Charles Augustin de . 1736--1806, French physicist: made many discoveries in the field of electricity and magnetism

## coulomb

A standard unit of electrical charge. Pronounced "kool-ahm," one coulomb (C) is equivalent to one amp of current flowing through a conductor for one second. It is also equal to 6.25 quintillion electrons (6.25 X 10 to the 18th). From French physicist Charles de Coulomb (1736-1806), who measured the behavior of electrical charges. See capacitance.
References in periodicals archive ?
Columb, & Sharon Duffy He added: "Last time I was here I did it just to get one over on the justice system.
An ethos that has lasted for 25 years is "still as strong as ever", says Columb.
The court heard Columb, of Blackburn, West Lothian, told police "I just need a lawyer" after he was arrested.
It did feel like we were starting all over again but there was a terrific feeling of community that we must not let this stop us," says Columb, a semi-retired engineer.
Mr Rogers told the hearing the couple had an argument and Mr Columb ended up sleeping in an armchair in the living room.
The Four Burrow will race on Easter Monday at Trebudannon near St Columb in Cornwall.
Columb Harrington, CEO of U4EA Technologies, explained "Service providers need to both monitor and enforce SLAs (Service Level Agreements) at the customer premise equipment, particularly when rolling out premium real-time services such as VoIP.
Global Banking News-September 11, 2014--Barclays to close branch in St Columb Major
Among the local talent performing are Duplex Urban EDM Duo - two boys from Coventry, Columb Flinn and Jasraj Sahota.
A military police probe has been launched following the thefts at the Columb Barracks in Mullingar.
The RSPCA was called to rescue the heifer from a field at Higher Fraddon, St Columb, Cornwall.

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