The magnetic pole on rotor of alternator are of:
- Salient type construction
- Non-salient type construction
- Both of these
- None of these
Correct answer: 3. Both of these
Explanation: The magnetic poles on the rotor can be of either salient or non-salient construction.
Salient construction: The term salient implies “protruding” or “sticking out”. Such a salient pole is a magnetic pole that sticks out from the surface of the rotor. Salient construction is used for rotors with four or more poles.
Non-salient construction: Nonsalient pole is a magnetic pole constructed flush with the surface of the rotor. Such rotor construction is normally used for two- and four-pole rotors.