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What is the effect of p.f. on secondary burden?

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What is the effect of p.f. on secondary burden?

(a) Ip shifts towards Io

(b) Ip deviates from Io

(c) Ip is independent of Io

(d) Ip and Io cancel eachother

I had been asked this question during an internship interview.

This question is from Characteristics of Potential Transformers topic in section Extension of Instrument Ranges of Electrical Measurements

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Best answer
The correct option is (a) Ip shifts towards Io

Best explanation: When the power factor of the secondary burden is reduced, Ip shifts towards Io. Voltages Vp and Vs come closer to Ep and Es.

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