ampere

noun
am·​pere | \ ˈam-ˌpir How to pronounce ampere (audio) also -ˌper How to pronounce ampere (audio) \
plural amperes

Definition of ampere

1 : the practical meter-kilogram-second unit of electric current that is equivalent to a flow of one coulomb per second or to the steady current produced by one volt applied across a resistance of one ohm
2 : the base unit of electric current in the International System of Units that is defined by setting the fixed numerical value of the elementary charge to 1.602176634 x 10-19 ampere seconds

Examples of ampere in a Sentence

a current of 15 amperes
Recent Examples on the Web To get the atoms whipping around the inner chamber of the Russian-nesting-doll-like machine, a magnet will drive 15 million amperes of electricity through them. Adam Lashinsky, Fortune, 24 Apr. 2020 To get the atoms whipping around the inner chamber of the Russian-nesting-doll-like machine, a magnet will drive 15 million amperes of electricity through them. Adam Lashinsky, Fortune, 24 Apr. 2020 To get the atoms whipping around the inner chamber of the Russian-nesting-doll-like machine, a magnet will drive 15 million amperes of electricity through them. Adam Lashinsky, Fortune, 24 Apr. 2020 To get the atoms whipping around the inner chamber of the Russian-nesting-doll-like machine, a magnet will drive 15 million amperes of electricity through them. Adam Lashinsky, Fortune, 24 Apr. 2020 To get the atoms whipping around the inner chamber of the Russian-nesting-doll-like machine, a magnet will drive 15 million amperes of electricity through them. Laura Mallonee, Wired, 21 Apr. 2020 Each bolt contained about 10,000 amperes of current at its peak. Eric Berger & Lee Hutchinson, Ars Technica, 20 July 2019 Each bolt contained about 10,000 amperes of current at its peak. Eric Berger & Lee Hutchinson, Ars Technica, 20 July 2019 Each bolt contained about 10,000 amperes of current at its peak. Eric Berger & Lee Hutchinson, Ars Technica, 20 July 2019 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ampere.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of ampere

1881, in the meaning defined at sense 1

History and Etymology for ampere

André-Marie Ampère

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Dictionary Entries Near ampere

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Cite this Entry

“Ampere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ampere. Accessed 24 May. 2022.

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More Definitions for ampere

ampere

noun
am·​pere | \ ˈam-ˌpir How to pronounce ampere (audio) \

Kids Definition of ampere

: a unit for measuring the strength of an electric current

ampere

noun
am·​pere | \ ˈam-ˌpi(ə)r also -ˌpe(ə)r \

Medical Definition of ampere

1 : the practical mks unit of electric current that is equivalent to a flow of one coulomb per second or to the steady current produced by one volt applied across a resistance of one ohm
2 : the base unit of electric current in the International System of Units that is equal to a constant current which when maintained in two straight parallel conductors of infinite length and negligible circular sections one meter apart in a vacuum produces between the conductors a force equal to 2 × 10−7 newton per meter of length

Ampère biographical name

Am·​père | \ äⁿ-ˈper How to pronounce Ampère (audio) \

Definition of Ampère

André-Marie 1775–1836 French physicist

More from Merriam-Webster on ampere

Nglish: Translation of ampere for Spanish Speakers

Britannica English: Translation of ampere for Arabic Speakers

Britannica.com: Encyclopedia article about ampere

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