Q. 195.0( 2 Votes )

What experiment do you suggest to understand Faraday's law? What items are required? What suggestions do you give to get good results of the experiment? Give precautions also.

Answer :

Aim: To study the Faraday’s Law.

Materials Required: A coil of copper wire; Bar Magnet; Galvanometer (For detecting the current in the circuit).


Procedure:


i. Connect the terminals of the coil to the sensitive galvanometer as shown in the figure.


ii. Keep the Bar Magnet stationary and note the observation.


iii. Push the bar magnet towards the coil with it’s North pole facing the coil and note the observation


iv. Move away the bar magnet from the coil and again note the observation



Observation:


i. When the bar magnet is stationary no deflection is produced I the needle of the galvanometer.


ii. When the Bar Magnet is moved towards the coil the needle of the galvanometer gets deflected.


iii. When the Bar Magnet is moved away from the coil the needle of the galvanometer gets deflected in the opposite direction.


Result and Explanation:


i. On Moving the Bar magnet towards the coil and away from the coil the magnetic flux passing through the coil changes and this change of flux induces the current in the coil. This is the faraday’s law.


Precautions:


1. The coil should be kept on an insulating surface.


2. The center of the galvanometer must be at zero


3. The Bar Magnet should be of good strength.


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