Rahvusvahelise suuruste süsteemi ISQ põhisuurus, ISQ base quantity, scalar quantity equal to the flux of the electric current density through a given directed surface, suurus, mis tähistab elektrivoolu tihedust jagatuna voolusuunalise pinnaga, scalar quantity equal to the quotient of the net quasi-infinitesimal electric charge dQ transferred through a surface during a quasi - infinitesimal time interval and the duration dt of that interval