Commercial electric motors do not use

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Solution

Q.
Commercial electric motors do not use:

1 An electromagnet to rotate the armature

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

3 A permanent magnet to rotate the armature

4 A soft iron core on which the coil is wound

Ans.
(3)

Using, electromagnet, the magnetic field strength further increase by, increasing the current. Hence, it will enhance the power of electric motor.

Solution

Q. Commercial electric motors do not use:

1 An electromagnet to rotate the armature

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

3 A permanent magnet to rotate the armature

4 A soft iron core on which the coil is wound

Ans. (3) Using, electromagnet, the magnetic field strength further increase by, increasing the current. Hence, it will enhance the power of electric motor.

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Q.
Commercial electric motors do not use:

Ans.
(3)

Using, electromagnet, the magnetic field strength further increase by, increasing the current. Hence, it will enhance the power of electric motor.