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abstraction > mathematical concept > unit > electromagnetic unit > current unit > ampere
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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
base SI unitSyteme Internationalea unit assumed to be mutually independent from which all other units are derived SI unit   
current unit   electromagnetic unit current 
ampereSyteme Internationaleconstant 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 lengthA base SI unitcurrentfixes the magnetic constant (permeability of vacuum) at exactly 4 × 10-7 H · m-1

Next base SI unitcandela    Upbase SI unit, current unit    Previous base SI unitsecond