A 4-pole, 3-phase induction motor operates from a supply whose frequency is 50 Hz. Calculate the speed of the rotor and frequency of the rotor currents when the slip is 0.04.
1
N = 1450 rpm and frequency is 4 Hz
2
N = 1440 rpm and frequency is 48 Hz
3
N = 1460 rpm and frequency is 4 Hz
4
N = 1440 rpm and frequency is 2 Hz