ABSTRACT
The phenomenon of magnetism is used in the operation of a great number of electrical apparatus including generators, motors, transformers, measuring instruments, televisions, radios, telephones, tape recorders, computer memories, computer magnetic tapes, car ignition tapes, refrigerators, air conditioners, heating equipment, and power tools. Electric machines, too, operate based on interaction of magnetic fields and the force and torque two magnetic fields exert on each other. This chapter begins by discussing the magnetic field created due to current in a conductor and then introduces the concept of magnetic circuits and their governing physical laws. This chapter also discusses core losses and flux calculations.
