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Solution


Q.

The phenomenon of electromagnetic induction is:
1 the process of charging a body.  
2 the process of generating magnetic field due to a current passing through a coil.  
3 producing induced current in a coil due to relative motion between a magnet and the coil.  
4 the process of rotating a coil of an electric motor.

Ans.

(3)

The phenomenon of electromagnetic induction is producing induced current in a coil due to relative motion between a magnet and the coil. When a coil is brought near the magnet, and a relative motion is generated between the two by either moving the magnet or the coil, the magnetic flux links through the coil changes. This change in the magnetic flux produces an emf or voltage and hence, subsequent electric current in the coil.