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abstraction > mathematical concept > unit > electromagnetic unit > current unit > ampere |
ampere comparison table |
Subject | is an acronym for | has definition | has symbol | is a kind of | is an instance of | is a unit of | has consequence |
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base SI unit | Syteme Internationale | a unit assumed to be mutually independent from which all other units are derived | SI unit | ||||
current unit | electromagnetic unit | current | |||||
ampere | Syteme Internationale | constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed 1 meter apart in vacuum, would produce between these conductors a force equal to 2 × 10-7 newton per meter of length | A | base SI unit | current | fixes the magnetic constant (permeability of vacuum) at exactly 4 × 10-7 H · m-1 |
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