When a short-circuit test on a transformer is performed at 25 V, 50 Hz, the drawn current ‘I1’ is at a lagging pf angle of Φ1.
If the test is performed by 25 V, 25 Hz and the drawn current ‘I2’ is at a lagging power factor angle Φ2 of then
A. I2 > I1 and Φ2 < Φ1
B. I2 < I1 and Φ2 < Φ1
C. I2 > I1 and Φ2 > Φ1
D. I2 < I1 and Φ2 > Φ1
Show Answer
Answer: A
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