. "Leakage Factor"@en . "http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=31891"^^ . "\\(\\sigma = 1 - k^2\\), where \\(k\\) is the coupling factor."^^ . . . "\"Leakage Factor\" is the ratio of the total magnetic flux to the useful magnetic flux of a magnetic circuit." . "\\(\\sigma\\)"^^ . . "\\(leakage-factor\\)"^^ . "http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=221-04-12"^^ .