railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical Machines Transformer Efficiency of a Transformer
A 50 kVA transformer has a core loss of 500 W and a full-load copper loss of 900 W. The load at which the efficiency is maximum is:
1
27.45 kVA
2
37.75 kVA
3
45.5 kVA
4
47.5 kVA