Impedance 03 : (Elec. Total resistance to the flow of an alternating current measured in ohms: Z = R + jX. Where Z is impedance, R is resistance and X is reactance and j2 = -1. Z, R and X are all in ohms. (RNo.=Dic of fire tech-B-FrT)
H. J. Porter (Chairman - Technical Committee), Dictionary of Fire Technology, The Institution of Fire Engineers, The Victory Press (Leicester) Ltd. 1979 UK. (Fr Tech - Brit) {81}