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In a dc machine, the armature is always on the rotor unlike an ac machine where it could be either on the stator or rotor, because | |
A. | commutation action would otherwise not be possible. [Correct Answer] |
B. | armature reaction demagnetising action would otherwise be more. [Wrong Answer] |
C. | otherwise it would not be possible to place compensating winding in pole shoes [Wrong Answer] |
D. | self-starting of dc motor would not be possible otherwise [Wrong Answer] |