Experiment 6.2

Experiment . In Fig. . the bar magnet is replaced by a second coil C connected to a battery. The steady current in the coil C produces a steady magnetic field. As coil C is * Wherever the term ‘coil or ‘loop’ is used, it is assumed that they are made up of conducting material and are prepared using wires which are coated with insulating material. FIGURE . When the bar magnet is pushed towards the coil, the pointer in the galvanometer G deflects. Josheph Henry [ – ] American experimental physicist professor at Princeton University and first director of the Smithsonian Institution. He made important improvements in electro- magnets by winding coils of insulated wire around iron pole pieces and invented an electromagnetic motor and a new, efficient telegraph. He discoverd self-induction and investigated how currents in one circuit induce currents in another.