engineering recuitment GATE EE 2023-24 Test Series Electrical Machines Transformer Efficiency of a Transformer
A 250 V/500 V, single phase transformer gave the following test results:
Short circuit test (LV short circuited): 20 V, 12 A, 100 Watts
Open circuited test (L.V. side): 250 V, 1 A, 80 watt.
Determine the efficiency of transformer when the output is 12 amp, 500 volts at 0.85 power factor lagging.
1
94.5%
2
96.6%
3
97.3%
4
None of these