Question

Q9. Commercial electric motors do not use *
an electromagnet to rotate the armature
Permanent magnet to rotate the armature
A soft iron core on which the coil is wound
none of these​

Answer 1

Answer:

The combination of soft iron core and coil is called an armature. It enhances the power of motor. Thus, commercial electric motors do not use permanent magnet to rotate the armature because permanent magnets are weak and do not produce strong magnetic field in the region...