Different type of construction in permanent type DC magnet are :
A. Slotted armature type
B. Surface wound armature type
C. Surface wound rotating armature, stationary wound type.
D. All of the mentioned
Answer:D
Different type of construction in permanent type DC magnet are :
A. Slotted armature type B. Surface wound armature type C. Surface wound rotating armature, stationary wound type. D. All of the mentioned
Explanation: Permanent magnet are the hard magnets that have broad B-H curve and can not be used as the core of the transformer due to their high retentivity and can be constructed by various ways as described above.