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• ampere
  ampere

  noun

  the basic unit of electrical current in the International System of Units (SI), equivalent to one coulomb per second, formally defined to be the constant current which if maintained in two straight parallel conductors of infinite length, of negligible circular cross section, and placed one meter apart in vacuum, would produce between these conductors a force equal to 2 × 10 −7 newton per meter of length. A, amp.
• Ampère
  Ampère

  noun

  André Marie 1775–1836, French physicist.

ampere

¹ American  

[am-peer, am-peer] / ˈæm pɪər, æmˈpɪər /

Or ampère

noun

Electricity.

1. the basic unit of electrical current in the International System of Units (SI), equivalent to one coulomb per second, formally defined to be the constant current which if maintained in two straight parallel conductors of infinite length, of negligible circular cross section, and placed one meter apart in vacuum, would produce between these conductors a force equal to 2 × 10 −7 newton per meter of length. A, amp.

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Ampère ² American  

[am-peer, ahn-per] / ˈæm pɪər, ɑ̃ˈpɛr /

noun

1. André Marie 1775–1836, French physicist.

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ampere ¹ British  

/ 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

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Ampère ² British  

/ ˈæmpɛə, ɑ̃pɛr /

noun

1. André Marie (ɑ̃dre mari). 1775–1836, French physicist and mathematician, who made major discoveries in the fields of magnetism and electricity

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Ampère ¹ Scientific  

/ ăm′pîr′,äm-pĕr′ /

1. French mathematician and physicist who is best known for his analysis of the relationship between magnetic force and electric current. He formulated Ampère's law, which describes the strength of the magnetic field produced by the flow of energy through a conductor. The ampere unit of electric current is named for him.

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ampere ² Scientific  

/ ăm′pîr′ /

1. The SI unit used to measure electric current. Electric current through any given cross-section (such as a cross-section of a wire) may be measured as the amount of electrical charge moving through that cross-section in one second. One ampere is equal to a flow of one coulomb per second, or a flow of 6.28 × 10 ¹⁸ electrons per second.

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Other Word Forms

• Amperian
  adjective

Etymology

Origin of ampere

First recorded in 1881; named after A. M. Ampère

Example Sentences

See Examples For:

ampere Ampère

Mr. Hasan said he gets 300,000 Iraqi dinars a month, about $235, from the owner of the generator, who charges local residents 9,000 dinars, about $7, per ampere per month to hook up their homes.

From New York Times ● Feb. 16, 2017

We measure the charge that flows for a current of one ampere in one second.

From Textbooks ● Aug. 12, 2015

This is the basis of the operational definition of the ampere.

From Textbooks ● Aug. 12, 2015

The General Conference on Weights and Measures meets in Sèvres, near Paris, to discuss how to redefine the kilogram, ampere, kelvin and mole.

From Nature ● Oct. 12, 2011

Thus with 11⁄2 volt 15 ampere dry cells, the combination or battery connected as shown would give 4 × 15 = 60 amperes at a pressure of 11⁄2 volts.

From Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications by Nehemiah Hawkins

Renault intends to remain the majority shareholder in its "Ampère" electrical division, which will employ around 10,000 people and could list on the stock market in the second half of 2023.

From Reuters ● Aug. 31, 2022

She had privileged status at sites from the Paris Observatory to the National Museum of Natural History, and in the laboratories of electrical-theory pioneers André-Marie Ampère and Antoine César Becquerel.

From Nature ● Oct. 21, 2014

Soon after its announcement in France, André Marie Ampère made a discovery of equal importance.

From The Story of Great Inventions by Elmer Ellsworth Burns

Arago Another important discovery was made by a young Frenchman, François Arago, within a year of the time when Oersted and Ampère made their discoveries.

From The Story of Great Inventions by Elmer Ellsworth Burns

He was theDeath of Ampère inventor of the electrical unit of measure which bears his name.

From A History of the Nineteenth Century, Year by Year Volume Two (of Three) by Edwin Emerson