Ampere definition

ămpîr
Frequency:
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 × 1018 electrons per second.
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(person) 1775-1836; Fr. physicist & mathematician.
proper name
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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.
noun
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The basic unit of electric current, equal to one coulomb per second and equivalent to the current, flowing in two straight parallel wires of negligible cross section separated by a distance of one meter, that produces a force between the wires of 2.0 × 10−7 newtons per meter of length. The value of an ampere in the International System differs very slightly from that in the meter-kilogram-second-ampere system of units.
noun
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A unit of electrical current, the standard base unit in the International System of Units. Abbreviation: amp, Symbol: A.

Definition: The ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed 1 metre apart in vacuum, would produce between these conductors a force equal to 2 x 10–7 newton per metre of length. (The International Bureau of Weights and Measures)

noun
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Abbreviated amp. 1.The unit of electric current equivalent to the flow of one coulomb of charge per second past any cross section at any point in a circuit, with a coulomb being 6.24
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The definition of an ampere is the basic unit for measuring electricity.

The accepted standard unit used for measuring how fast an electric current flows is an example of an ampere.

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Other Word Forms

Noun

Singular:
ampere
Plural:
amperes, ampres

Origin of ampere

  • After André Marie Ampère

    From American Heritage Dictionary of the English Language, 5th Edition

  • Named after the French physicist André-Marie Ampère.

    From Wiktionary