A two-phase induction motor is operating at rated-load torque with balanced stator currents. The steady-state rotor speed is ωr = 0.9ωe.It is an eight-pole, 50-Hz device. Determine
(a) the actual rotor speed,
(b) the angular velocity of the rotor mmf relative to the rotor, and
(c) the frequency of the rotor currents.