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Commercial electric motors do not use:...

Commercial electric motors do not use:

A

(a) an electromagnet to rotate the armature

B

(b) effectively large number of turns of conducting wire in the current-carrying coil

C

(c) a permanent magnet to rotate the armature

D

(d) a soft iron core on which the coil is wound

Text Solution

Verified by Experts

The correct Answer is:
C
A permanent magnet is weak.
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