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Q1. A six pole three phase induction motor operates from a 380 V 60 Hz supply. It draws a current of 40 A at power factor 0.7. The frequency of the e.m.f. in the rotor is 2.4 Hz. If the stator loss is 4 kW and the rotational losses (windage and friction) total 3 kW, calculate EACH of the following:

(a) The power input;

(b) The slip;

(c) The rotor copper loss;

(d) The shaft output power.