FARADAY'S LAWS

           FARADAY'S LAWS OF ELECTRO
                 MAGNETIC INDUCTION

Faraday's Laws of Electro Magnetic Induction states that when there is a rate of change of flux in a conductor emf will be induced in the conductor.

By below following cases we can discuss Faraday's Laws

FARADAY'S FIRST LAW:

CASE : 1

                   

When the magnet is at stationary with respect to the coil shown in above figure. There will be No induced emf in the coil .

So that galvanometer shows No deflection of niddle. So we confirm that no current flows in the circuit of solenoid.

                        E =  0 v   and  hence I = 0A

 CASE : 2

                 

               

In the above figure we can see that the magnet moved towards the solenoid circuit i.e, a winding there is a change in magnetic field with respect to solenoid circuit.

There will be occurance of deflection in galvanometer so that we can say that when there is an emf there is a flow of current if the circuit is closed. In the above case there is a deflection in galvanometer so that we can say current flowing in the circuit.

Hence emf induced in coil called solenoid.

Atlast we conclude that when there is a change in magnetic field with respect to conductor emf will be induced in conductor.

This is Faraday's 1st law.

FARADAY'S SECOND LAW:

Faraday's second law deals with the magnitude of emf induced.

According to Faraday's second law magnitude of induced emf is proportional to the rate of change of magnetic field with respect to time is the Faraday's second law.

                   E  =  - N d(flux)/dt ---------(1)

Where ' N ' is the number of turns of winding or solenoid.

This is Faraday's 2nd law.

 Negitive ' - ' sign is explained by Lenz Law.