Q1.
A 20 kVA, 2.5 kV/250 V, single- phase transformer gave the following test results :
Open-circuit test: 250 V, 0.8 A, 90 W
Short-circuit test: 80 V, 6 A, 60 W
The kVA output at maximum efficiency of the transformer will then be
- (a) 24.49
- (b) 18.37
- (c) 23.70
- (d) 16.87