Question

The phenomenon of electromagnetic induction is

• A. the process of charging a body
• B. the process of generating a magnetic field due to current passing through a coil
• C. producing induced current in a coil due to relative motion between a magnet and the coil.
• D. the process of rotating a coil of an electric motor.

Answer 1

The correct option is C

producing induced current in a coil due to relative motion between a magnet and the coil.

Electromagnetic induction:

1. Electromagnetic induction is a phenomenon in which a changing magnetic field across a wire loop produces an induced emf.
2. When a magnet and a coil move relative to one another, magnetic flux changes, and an electromotive force is generated in the coil.
3. The induced current is produced by this electromotive force.

In the above experiment of Electromagnetic induction Explanation:

1. Using a magnet and a coil, a galvanometer is connected across the coil. Because the magnet is at rest at the start, there is no deflection in the galvanometer, and the needle is at the centre or zero position.
2. The needle of the galvanometer deflects in one direction when the magnet is moved towards the coil.
3. When the magnet is held stationary in that position, the galvanometer needle returns to zero.
4. When the magnet is moved away from the coil, the needle deflects in the opposite direction, and when the magnet becomes stationary with respect to the coil, the needle of the galvanometer returns to the zero position.

Hence, Option(C) is correct.