The commercial electric motors uses ____magnet to rotate the armature.

An electromagnet to rotate the armature

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

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a bar magnet

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All of the above

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Solution

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.

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Similar questions

Commercial electric motors do not use a permanent magnet to rotate the armature.

Question 6
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

Q. The main advantage of a permanent magnet over an electromagnet is that a permanent magnet does not require a continuous supply of electrical energy to maintain its magnetic field.
State whether the above statement is true or false?

Q. Fill in the blanks
i) For a motor : a permanent magnet, then commercial motor : _______
ii) Focal length of a lens; metre, then for power of a lens ___________

Q. Fill in the blanks.
a) For a motor : a permanent magnet, then for a commercial motor : ..................
b) Focal length of a lens : metre, then for power of a lens : ..................

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