Decrease in p.f. makes Vs to lead Vp.
A. True
B. False
The question was posed to me in examination.
This key question is from Characteristics of Potential Transformers in division Extension of Instrument Ranges of Electrical Measurements
Correct choice is A. True
The explanation: As the power factor is decreased, Vs leads in phase while Vp decreases in phase. Thus the phase angle reduces with the decrease in power factor (lagging).