faraday's law's and its applications
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Faraday’s Laws and its applications
Presentation by Sayan Samanta Department-Electrical Engineering Semester-3rd
Roll No-194
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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).
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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.
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Faraday’s Law of Induction
tN B
induced emf
number of loops
rate of changeof flux with time
Minus sign from Lenz’s Law:
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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
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Faraday’s law of induction:
[1 loop]
[N loops]
Faraday’s Law of Induction
Lenz’s Law
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This effect can be quantified by Faraday’s Law
Experimental Observation of Induction
Fig. 1 Fig. 2 Fig. 3
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Applications of Faraday’s Law
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Electric Guitar
Pickups
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Generator
Electromagnetic Induction
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Magnetic Recording
Electromagnetic Induction
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1. Transformers 2.Induction Cookers 3.Electromagnetic Flow Meters
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Conclusion
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Thank YouAny Question