railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical Machines Transformer Regulation of a Transformer
Calculate the percentage voltage drop for a transformer with a percentage resistance of 2.5% and a percentage reactance of 5% of rating 500 KVA when it is delivering 400 KVA at 0.8 p.f. lagging.
1
4%
2
6%
3
8%
4
None of these