State True or False:

Commercial electric motors do not use a permanent 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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Solution

The correct option is A
An electromagnet to rotate the armature

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

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

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Similar questions

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. Why an armature of an electric motor rotate ?

Q. State whether True or False :

The speed of DC series motor is directly proportional to armature current.

If the number of turns in the armature coil is doubled, the speed of rotation of the armature coil ___.

Q. Statement 1: Permanent magnet is used in commerical electric motors.
Statement 2: Number of turns of conducting wire is kept low.
Select the correct option from below.

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State True or False: Commercial electric motors do not use a permanent magnet to rotate the armature.

The correct option is A An electromagnet to rotate the armature 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 (iii) a soft iron core on which the coil is wound.

State True or False:

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

The correct option is A
An electromagnet to rotate the armature

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

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