A 4-pole,3-phase induction motor operates from a supply whose frequency is 50HZ.
Calculate:
i) the speed at which the magnetic field of stator is rotating.
ii) the speed of the motor when the slip is 0.04.
iii) the fequency of the rotor currents when the slip is 0.03.
iv) the frequency of the rotor currents at standstill.