IIT JEE , AIEEE Forum - Physics , Magnetism - [Admin]: real cause of electromagnetic induction

sma_496

what is the real cause of electromagnetic induction ?

aravindh_ramaswamy

Hey,try this link!

http://en.wikipedia.org/wiki/Electromagnetism

And rate me if u find this useful!

cheets!

mohnish_khiani

The main cause for induction is the change in the magnetic flux linked with the two substances due to movment of the substance.Due to this there is a attractive or repulsion force current set up in the substances.

priya_jumbo

FIRST I EXPLAIN U WT IS ELECTROMAGNETIC INDUCTION?

THE PHENOMENON OF PRODUCTION OF EMF IN THE CONDUCTOR OR COIL BY RELATIVE MOTION BETWEEN CONDUCTOR AND MAGNET IS CALLED ELECTROMAGNETIC INDUCTION.

NOW THE CAUSE BEHIND IT IS:

WHEN THERE IS RELETIVE MOTION BETWEEN CONDUCTOR (OR COIL) AND MAGNET, THE MAGNTIC FLUX PASSING THROUGH THE CONDUCTOR IS CHANGED DUE TO WHICH INDUCED EMF IS PRODUCED IN THE CONDUCTOR AND INDUCED CURRENT FLOWS IN THE CONDUCTOR.

IF U UNDERSTAND THEN RATE ME

THANKS

krishna.gopal

HI SMA, in emi emf is induced in the circuit when there is change of magnetic flux through it. The real cause of this is the fact that such changing flux produces rotating electric field in the space.

sanat_sachar

The cause is change in magnetic flux by movement of conductor
known as lenz rule.

khinart

Hey sanat_sachar I think that U are a bit of incomplete there and rather wrong. Lenz law gives the statement about the direction of induced emf.
It states that
"The direction os the emf is such that it opposes the cause of producing it".

khinart

Now sma_496 the answer to Ur question is very short and easy to understand.

The emf is produced in a coil mainly and mainly due to change in the current linked with the coil.It can be due to following.

1)Motion of conductor in a uniform magnetic field.

2)Placing the conductor in the non uniform magnetic field.

3)Rotating the conductor in a uniform magnetic field(Currents produced are called eddy currents)

These are the chief causes of change in emf DUE TO CURRENT ONLY.

Ask & Discuss Questions with Community & Experts