Faraday’s Laws and its applications

Presentation by Sayan Samanta Department-Electrical Engineering Semester-3rd

Roll No-194

Faraday’s Law of Electromagnetic Induction

Faraday’s Law is the result of the experiments of the English Chemist and Physicist Michael Faraday(1791-1867).

Faraday’s Laws of Electromagnetic Induction

First Law:-Whenever the magnetic flux linked with a circuit changes,an e.m.f is always induced in it.

Second Law:-The magnitude of the induced e.m.f is equal to the rate of change of flux-linkages.

Faraday’s Law of Induction

tN B

induced emf

number of loops

rate of changeof flux with time

Minus sign from Lenz’s Law:

Faraday’s Law of Induction

Lenz’s LawThe current from the induced emf will produce a magnetic field,which will always oppose the original change in the magnetic flux.

Magnetic flux:

Unit of magnetic flux: weber, Wb.

1 Wb = 1 T·m2

Faraday’s law of induction:

[1 loop]

[N loops]

Faraday’s Law of Induction

Lenz’s Law

This effect can be quantified by Faraday’s Law

Experimental Observation of Induction

Fig. 1 Fig. 2 Fig. 3

Applications of Faraday’s Law

Electric Guitar

Pickups

Generator

Electromagnetic Induction

Magnetic Recording

Electromagnetic Induction

1. Transformers 2.Induction Cookers 3.Electromagnetic Flow Meters

Conclusion

Thank YouAny Question