Electrical Engineering ⇒ Topic : Introduction of electromagnetic induction

Introduction

In the beginning of nineteenth century, Oersted discovered that a magnetic field exists around a current-carrying conductor. In other words, magnetism can be created by means of an electric current. Can a magnetic field create an electric current in a conductor ? In 1831, Michael Faraday, the famous English scientist, discovered that this could be done. He demonstrated that when the magnetic flux linking a conductor changes, an e.m.f. is induced in the conductor. This phenomenon is known as electromagnetic induction. The great discovery of electromagnetic induction by Faraday through a series of brilliant experiments has brought a revolution in the engineering world. Most of the electrical devices (e.g. electric generator, transformer, telephones etc .) are based on this principle.In this chapter, we shall confine our attention to the various aspects of eletromagnetic induction.