A 150 kW electric motor has an efficiency of 92 %, when it operates at full load. Calculate the losses in the machine. 

(A) 92 kW (B) 150 kW (C) 163 kW (D) 13 kW 
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efficiency  -output /input * 100

150/0.92----------163(input)

losses-----(163--150)  ---------13kw.

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