Introduction - Electromagnetic Induction | 12th Physics : Electromagnetic Induction and Alternating Current
Chapter: 12th Physics : Electromagnetic Induction and Alternating Current
Electromagnetic Induction
ELECTROMAGNETIC INDUCTION
Introduction
In the previous chapter,
we have learnt that whenever an electric current flows through a conductor, it
produces a magnetic field around it. This was discovered by Christian Oersted.
Later, Ampere proved that a current-carrying loop behaves like a bar magnet.
These are the magnetic effects produced by the electric current.
Physicists then began to
think of the converse effect. Is it possible to produce an electric current
with the help of a magnetic field? A series of experiments were conducted to
establish the converse effect. These experiments were done by Michael Faraday
of UK and Joseph Henry of USA, almost simultaneously and independently. These
attempts became successful and led to the discovery of the phenomenon, called
Electromagnetic Induction. Michael Faraday is credited with the discovery of
electromagnetic induction in 1831.
In this chapter, let us
see a few experiments of Faraday, the results and the phenomenon of
Electromagnetic Induction. Before that, we will recollect the concept of
magnetic flux linked with a surface area.
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