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Q4. A three phase, 440 V, 60 Hz, 8 pole induction motor drives a load of 7 kW and runs at 14.4 rev./sec. The power factor is 0.8 lag. The stator loss is 0.6 kW and the rotational losses (windage+ friction) are 0.4 kW. Calculate EACH of the following.

(a) The slip; (3)

(b) The frequency of rotor e.m.f; (2)

(c) The input power to the motor; (8)

(d) The line current. (3)