Question

1) Is the current induced when a bar magnet is moving in two different coils having
different number of turnings. Why?
2) What happened if ‘C1’, ‘C2’ slip rings are not rotated along with armature in electric
moto

Answer 1

Answer:

i)The current induced in a bar magnet is moving into different coils having different numbers of turning is due to Faraday's law of electromagnetic induction.

ii)By moving this bar magnet “in” and “out” of the coil a current would be induced into the coil by the physical movement of the magnetic flux inside it.  

iii)Likewise, if we kept the bar magnet stationary and moved the coil back and forth within the magnetic field an electric current would be induced in the coil. Then by either moving the wire or changing the magnetic field we can induce a voltage and current within the coil and this process is known as Electromagnetic Induction and is the basic principle of operation of transformers, motors and generators.

iii) This explains the current induced in a bar magnet due to its movement into different coils having different numbers.