ABSTRACT
This introduction provides a general background of the contents of the book and allows easy identification of the section or chapter that may be most appropriate for the question or problem at hand.
The basis for heating metal by induction was discovered in 1831 by the English physicist Michael Faraday. While experimenting in his laboratory with two coils of wire wrapped around a common iron core, he discovered that if the switch connecting a battery to the first coil was closed, a momentary current could be measured in one direction on a galvanometer placed in series with the second coil. If the switch remained closed, no current was detected in the second coil. When the switch was opened, a current was again detected in the second coil, but in the opposite direction to that measured when the switch was closed.
