Ampere

urn:aero:airm:1.0.0:ContextualModel:ATMBusinessTerms:Ampere

The ampere is that constant electric current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed 1 metre apart in a vacuum, would produce between these conductors a force equal to 2 x 10-7 newton per metre of length.

Source: ICAO
Abbreviations: A