Question

The commercial electric motors uses ____magnet to rotate the armature.

• A. An electromagnet to rotate the armature
• B. Effectively large number of turns of conducting wire in the current carrying coil
• C. a bar magnet
• D. All of the above

Answer 1

The correct option is B

Effectively large number of turns of conducting wire in the current carrying coil

The commercial motors use (i) an electromagnet in place of a permanent magnet (ii) a large number of turns of the conducting wire in the current carrying coil, and (iii) a soft iron core on which the coil is wound.