Asked by  | 30th Jul, 2012, 06:36: AM

Expert Answer:

When we apply the right hand rule on each wire in a coil, we find that the direction of magnetic field in the core adds up in the same direction and in  the outside portion, the magnetic field lines behave the way they do in case of bar magnet.

Answered by  | 30th Jul, 2012, 07:12: PM

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