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32. Commercial electric motors do not use (a) an electromagnet to rotate the armature (b) 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

32. Commercial electric motors do not use
(a) an electromagnet to rotate the armature
(b) 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

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 8741 Points
one month ago
Answer: c Explanation: (c) Using electromagnet, the magnetic field strength further increase by increasing the current. Hence it will enhance the power of electric.

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