railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical Machines Transformer Efficiency of a Transformer
If P1 and P2 be the iron and copper losses of a transformer on full load, find the ratio of P1 and P2 such that maximum efficiency occurs at 80% full load
1
\(\frac{P_1}{P_2}=\frac{4}{5}\)
2
\(\frac{P_1}{P_2}=\frac{5}{4}\)
3
\(\frac{P_1}{P_2}=\frac{25}{16}\)
4
\(\frac{P_1}{P_2}=\frac{16}{25}\)