Question

You have a soft iron on which a wire of 25 turns in wound. You replace the wire by a longer one of 50 turns. Compare the strengths of both electromagnets.

Answer 1

the strength will automatically increase as strength of electromagnetic is directly proportional to no.of turns

Answer 2

Strngth of an electromagnet depends on number of turns i.e. more number of turns means magnetic field strength more and vice versa.