The experiments of Michael Faraday in England and
Joseph Henry in USA, conducted around 1830, demonstrated
conclusively that electric currents were induced in closed coils when
subjected to changing magnetic fields In this chapter, we will study the
phenomena associated with changing magnetic fields and understand
the underlying principles The phenomenon in which electric current is
generated by varying magnetic fields is appropriately called
electromagnetic induction When Faraday first made public his discovery that relative motion
between a bar magnet and a wire loop produced a small current in the
latter, he was asked, “What is the use of it