railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical Machines Transformer Transformer Copper Losses
If P1 and P2, be the iron and copper losses of a transformer on full-load, what is the ratio of P1 and P2 such that maximum efficiency occurs at 75% full-load ?
1
4/3
2
3/4
3
5/7
4
9/16