Or this salty water. Now, the outside of electric wires are usually covered in plastic because it’s a very poor conductor. It hardly conducts any electricity at all, so we can say it’s an ...

IN a paper entitled “Eddy Current Losses in Single-Conductor Paper-Insulated Lead-Covered Un-armoured Cables of a Single-Phase System“(J. Inst. Elec. Eng., 89, Pt. 2, No. 12 ; December 1942 ...