The expected answers were:
(a) (i) Iron loss test (ii) Copper loss test (b) (i) Efficiency (in ) = 0.95 = Total power loss = 5(1 – 0.95) = 0.25kW (ii) Output power = Input power – Total power loss = 5 kW – 0.25 kW = 4.75 kW
The question was on A.C. machines. The question was well attempted by the candidates and they put up a good performance.
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