Relation Between Magnetism And Electricity

Hey I am Here to discuss about the Small Topic Relation between Magnitism And Electricity

Relation Between Magnetism And Electricity

It is well known that whenever an electric current flows through a conductor, a magnetic field is

immediately brought into existence in the space surrounding the conductor. It can be said that when

electrons are in motion, they produce a magnetic field. The converse of this is also true i.e. when a

magnetic field embracing a conductor moves relative to the conductor, it produces a flow of electrons

in the conductor. This phenomenon whereby an e.m.f. and hence current (i.e. flow of electrons) is

induced in any conductor which is cut across or is cut by a magnetic flux is known as electromagnetic

induction.

The historical background of this phenomenon is this :

After the discovery (by Oersted) that electric current produces a magnetic field, scientists began

to search for the converse phenomenon from about 1821 onwards. The problem they put to themselves was how to ‘convert’ magnetism into electricity. It is recorded that Michael Faraday* was in

the habit of walking about with magnets in his pockets so as to constantly remind him of the problem.

After nine years of continuous research and experimentation, he succeeded in producing electricity

by ‘converting magnetism’. In 1831, he formulated basic laws underlying the phenomenon of electromagnetic induction (known after his name), upon which is based the operation of most of the

commercial apparatus like motors, generators and transformers etc.