Q. A 50 Hz, 4poles, a single phase induction motor is rotating in the clockwise direction at a speed of 1425 rpm. The slip of motor in the direction of rotation & opposite direction of the motor will be respectively.
✅ Correct Answer: (C)
0.05, 1.95
Explanation: synchronous speed, ns=120×50÷4=1500 rpm. given a number of poles = 4. supply frequency is 50 hz. rotor speed is 1425 rpm. s=ns-nr÷ns=1500- 1425÷1500=.05. sb=2-s=1.95.