Help with Basic Homework, about electromagnetic induction

[mrkan]

Ok, so my class has spent about a day on the topic of electromagnetic induction and I really you help on this subject because tomorrow i have a quiz.

I don't need you to explain it in a super detailed way but in a fashion where the teacher will realize that i actually understand these topics.

1. How does electromagnet induction work? Basic definition?
2. How do I find the direction of current when I am inducing a magnetic field? I know this is related to the right hand rule but i need someone to explain it further.
3. How do transformers work (All I really know is it is something about 2 coils)

 

[1994Bhaskar]

UNDERSTAND THE TOPIC BY SOUL.NO NEED TO SHOW OFF YOUR TEACHER THAT YOU KNOW IT.YOU BETTER UNDERSTAND IT.

1.FIRSTLY electromagnetic induction(EMI) IS CAUSED DUE TO RATE OF CHANGE OF FLUX.
EX.IF I MOVE A MOVABLE ROD OF LENGTH 'L' CONNECTED TO A CIRCUIT IN REGION WHERE MAGNETIC FIELD IS THERE.THEN THE ELECTRONS IN JUMPER MOVE TO RIGHT WITH VELOCITY V.ALSO MAGNETIC FORCE ACTS PERPENDICULAR TO VELOCITY ON ELECTRONS F=-eVB.
WHERE e IS ELECTRONIC CHARGE & B THE MAGNETIC FIELD.
NOW ELECTRIC FIELD CORRESPONDING TO FORCE E=F/(-e)=(V x B)
WE HAVE POTENTIAL V=E x L=-VBL
NOW VL=INCREMENT IN AREA=dS/dt
V=-B*dS/dt=-(B*dS)/dT=-d(fi)/dT= -RATE OF CHANGE OF FLUX.
THE REST TRY TO UNDERSTAND THEM YOURSELF.