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Commercial electric motors do not use 

(a) an electromagnet to rotate the armature 

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

(c) a permanent magnet to rotate the armature 

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

1 Answer

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The answer is (c) a permanent magnet to rotate the armature

In electric motors Electro magnet is used instead of permanent magnet.

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