A 100 kW, 460 V shunt generator was run as a motor on no load at its rated voltage and speed. The total current taken was 9.8 A, including a shunt current of 2.7 A. The resistance of the armature circuit (including compoles) at normal working temperature was 0.11 Ω. Calculate the effciencies at
(a) full load;
(b) half load.
