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1. |
A balanced three-phase, 50 Hz voltage is applied to a 3 phase, 4 pole, induction motor. When the motor is delivering rated output, the slip is found to be 0.05. The speed of the rotor m.m.f. relative to the rotor, structure is |
A. | 1500 r.p.m |
B. | 1425 r.p.m |
C. | 25 r.p.m |
D. | 75 r.p.m |
Answer» E. | |