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Magnetic field of an electric current :
A current carrying conductor behaves like a magnet. A magnetic field is produced around it by the electric current.
Electromagnetic induction :
If there is change in the magnetic field associated with a coil of wire, an electric current is produced in coil. It is called an induced current and the corresponding phenomenon is called electromagnetic induction.
In electromagnetic induction
(1) An electric current flows through the coil as long as the magnet is moving ( or as long as the magnetic field is changing )
(2) The direction of current depends upon the direction of motion of the magnet ( or on the way the magnetic field changes ).
The phenomenon of electromagnetic induction was discoved by Michael Faraday.
Applications:
Electric motor :
The production of magnetic field by an electric current is made use of in an electric motor.
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