Definition of 'ampere'

Word Frequency

ampere

(æmpeəʳ , US -pɪəʳ )

Word forms: plural amperes regional 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.

Word Frequency

Ampère in British

(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

Word Frequency

ampere in British

(ˈæmpɛə )

noun

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

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 of 'Ampère'

C19: named after André Marie Ampère

Word Frequency

Ampère in American

(ɑ̃ˈpɛʀ; änperˈ)

André Maˈrie (ɑ̃dʀeɪ maˈʀi) ; ändrā mȧrēˈ) 1775-1836; Fr. physicist & mathematician

Word Frequency

ampere in American

(ˈæmˌpɪr ; amˈpirˌ)

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 maintained in 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

ampere in Electrical Engineering

(æmpɪər) or A

Word forms: (regular plural) amperes

noun

(Electrical engineering: Circuits, Electrical power)

An ampere is a measure of electrical current.

An ampere is the unit of measurement of electrical current produced in a circuit by 1 volt acting 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.