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Keywords: Ampere-def-en.svg en Illustration of the definition of ampere as the constant current that will produce an attractive force of 2 × 10 “7 newton per metre of length between two straight parallel conductors of infinite length and negligible circular cross section placed one metre apart in a vacuum 2011-11-12 Created with Inkscape Danmichaelo Version with dot multiplication symbol Uploaded with UploadWizard Electromagnetic forces |