railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical Machines Transformer Efficiency of a Transformer
The iron loss in a 10 kVA transformer is 1 kW and the full load copper losses are 2 kW. The maximum efficiency occurs at a load of
1
14.1 kVA
2
7.07 kVA
3
5 kVA
4
7.07 kW