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  1. en.wikipedia.org › wiki › AmpereAmpere - Wikipedia

    The ampere (/ ˈ æ m p ɛər / AM-pair, US: / ˈ æ m p ɪər / AM-peer; symbol: A), often shortened to amp, is the unit of electric current in the International System of Units (SI). One ampere is equal to 1 coulomb (C) moving past a point per second.

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  3. Ampere, unit of electric current in the International System of Units (SI), named for 19th-century French physicist Andre-Marie Ampere. It represents a flow of one coulomb of electricity per second. A flow of one ampere is produced in a resistance of one ohm by a potential difference of one volt.

  4. Ampere is defined as the unit of electric current that is equal to the flow of one Coulomb per second. Ampere is named after the French Physicist and Mathematician Andre-Marie Ampere.

  5. The ampere is a basic unit of electric current, often called an "amp". It is a unit of electrical constant current of one ampere. The ampere is one of several electrical charge units used to measure the electromagnetic force between straight parallel conductors carrying electric current.

  6. www.nist.gov › si-redefinition › ampere-introductionAmpere: Introduction | NIST

    May 15, 2018 · The ampere (A), the SI base unit of electric current, is a familiar and indispensable quantity in everyday life. It is used to specify the flow of electricity in hair dryers (15 amps for an 1,800-watt model), extension cords (typically 1 to 20 amps), home circuit breakers (15 to 20 amps for a single line), arc welding (up to around ...

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  8. www.bipm.org › en › si-base-units- ampere - BIPM

    The ampere, symbol A, is the SI unit of electric current. It is defined by taking the fixed numerical value of the elementary charge e to be 1.602 176 634 x 10 –19 when expressed in the unit C, which is equal to A s, where the second is defined in terms of Δν Cs.

  9. Formal definitions of the standard electrical units: ampere, coulomb, charge on an electron, and the volt. Written by Willy McAllister. Electrical units can be described in a formal manner, and that's what we do here.

  10. www.nist.gov › si-redefinition › ampere-historyAmpere: History | NIST

    May 15, 2018 · André-Marie Ampère The story of the ampere began when a Danish physicist named Hans Christian Ørsted discovered that magnetism and electricity were two aspects of the same thing. In 1820, he showed that you could make a compass needle deflect from north by putting it near an electric current.

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