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A 60 kW, 400 V d.c. shunt motor has 4 poles a 2-circuit wave-connected armature winding...

A 60 kW, 400 V d.c. shunt motor has 4 poles a 2-circuit wave-connected armature winding with
450 conductors. The flux per pole is 45 mWb. The full-load efficiency of the motor is 90.5%. The
armature and interpole windings have a total resistance of 0.1 Ω. The shunt field resistance is
200 Ω. Calculate (i) the line current (ii) full-load speed and (iii) armature torque.

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