Word forms: plural amperesregional note: in BRIT, also use ampère
countable noun
An ampere is a unit which is used for measuring electric current. The abbreviation amp is also used.
Ampère in British English
(ˈæmpɛə, French ɑ̃pɛr)
noun
André Marie (ɑ̃dre mari). 1775–1836, French physicist and mathematician, who made major discoveries in the fields of magnetism and electricity
ampere in British English
(ˈæmpɛə)
noun
1.
the basic SI unit of electric current; the constant current that, when maintained in two parallel conductors of infinite length and negligible cross section placed 1 metre apart in free space, produces a force of 2 × 10–7 newton per metre between them. 1 ampere is equivalent to 1 coulomb per second
2.
a former unit of electric current (international ampere); the current that, when passed through a solution of silver nitrate, deposits silver at the rate of 0.001118 gram per second. 1 international ampere equals 0.999835 ampere
Abbreviation: amp Symbol: A
Word origin
C19: named after André Marie Ampère
Ampère in American English
(ɑ̃ˈpɛʀ)
André Maˈrie (ɑ̃dʀeɪ maˈʀi) 1775-1836; Fr. physicist & mathematician
ampere in American English
(ˈæmˌpɪr)
noun
the basic unit of electric current intensity, equal, in the MKS system, to a rate of flow of charge in a conductor or conducting medium of one coulomb per second and, in the SI system, to a constant current that, if maintainedin two straight parallel conductors of infinite length and negligible circular cross section placed one meter apart in a vacuum, would produce between these conductors a force equal to 2×10-7 newton per meter of length: abbrev. A or amp
An ampere is the unit of measurement of electrical current produced in a circuit by 1 voltacting through a resistance of 1 ohm.
A current of more than 100 amperes is required to turn the car engine for starting.
An ampere is a measure of electrical current.
ampere-hour, ampere-turn
Word originsThis word is named for the French physicist Andre-Marie Ampere (1775-1836) who worked out the relationship between magnetism and electricity.
In other languages
ampere
British English: ampere NOUN
An ampere is a unit used for measuring electric current.
It is the charge transferred by one ampere in one second.
American English: ampere
Brazilian Portuguese: ampere
Chinese: 安培
European Spanish: amperio
French: ampère
German: Ampere
Italian: ampere
Japanese: アンペア
Korean: > 암페어 전류의 단위
European Portuguese: ampere
Latin American Spanish: amperio
All related terms of 'ampere'
ampere-hour
a practical unit of quantity of electricity ; the quantity that flows in one hour through a conductor carrying a current of 1 ampere . 1 ampere-hour is equivalent to 3600 coulombs
ampere-turn
a unit of magnetomotive force ; the magnetomotive force produced by a current of 1 ampere passing through one complete turn of a coil . 1 ampere-turn is equivalent to 4π/10 or 1.257 gilberts
volt-ampere
the product of the potential in volts across an electrical circuit and the resultant current in amperes
Ampère's law
the law that a magnetic field induced by an electric current is, at any point, directly proportional to the product of the current intensity and the length of the current conductor , inversely proportional to the square of the distance between the point and the conductor, and perpendicular to the plane joining the point and the conductor