The rotor of a 4-pole, 50Hz, 3-phase slip-ring induction motor runs in clockwise direction when its stator terminals 1,2,3 are connected to supply terminals A. B, C respectively.
If 1,2,3, are connected to A, C, B, respectively of supply terminals and rotor runs in a clockwise direction at synchronous speed, then the frequency of induced emf across the open-circuited rotor terminals is
A. 50 Hz
B. zero
C. 25 Hz
D. 100 Hz
Show Answer
Answer: D
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