Electromagnetic Induction

introduction: 

     Electricity and magnetism were considered separate and nonrelated branches for a long time. In the early decades of the nineteenth centuary,experiments on electric current carried out by Oersted,Ampere and a few others established the fact that electricity and magnetism are interrelated to each other. They found that moving electric changes (i.e.electric current) produce magnetic field. As for iiiustration, a current carring wire deflects a mgnetic needle placed in its vicinity. This phenomenon raised the questions like: Is the converse effect possible? Can moving magnets(i.e. magnetic field) produce electric current or not ? Dose the nature permit such a relation between electricity and magnetism?

Around 1830,  experiments conducted by michael faraday in England and joseph Henry in USA, demonstarated conclusively that electric current was induced in closed cil under the infulence of changing magnetic field. The phenomenon in which electric current is induced in a conductor by varying magnetic field is called electromagnetic induction

Practically the phenomenon of electromagnetic induction is of great importance. The historical experiments of Michale Faraday and Henry have led directly to the development of electric generators and transformers. Today's civilization ower its progress to a great extent to the discovery of electromagnetic induction.

IN the present topic we shall know about Farady's experiments, induced current and induced emf; and phenomena like self-induction,mutual induction, eddy currents based on it