• (America) IPA: /ˈæmˌpɪər/, /ˌæmˈpɪər/
  • (British) IPA: /ˈæmˌpɛər/

ampere (plural amperes)

  1. 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 × 10–7 newton per metre of length. (The International Bureau of Weights and Measures ↗)

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