Question

Faraday's law Faraday's law

Answer 1

Faraday's law of induction is a basic law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force (EMF)—a phenomenon called electromagnetic induction. It is the fundamental operating principle of transformers, inductors, and many types of electrical motors, generators and solenoids.

Answer 2

Faraday’s law of electromagnetic induction states that :

(i) When there is a change in the magnetic flux linked witht the coil , then an e.m.f is induced in the coil.  

(ii) The magnitude of e.m.f induced depends directly on the rate of change of magnetic flux linked with the coil.

Observations before Faraday made these conclusions :

(i) When there is motion between coil and magnet close to it , then only there will be flow of current.

(ii) The current is increased

(a) Faster movement  of the coil.

(b) Use of strong magnet.

(c) Use of larger area .

(d) Use of more turns in the coil.

The relative motion brings about change in magnetic flux which brings about an induced e.m.f

This e.m.f helps in the flow of current.

This is called electromagnetic induction.