Question

The voltage regulation of a transformer at full-load 0.8 p.f lagging is 2%. Its voltage regulation at full load 0.8 p.f leading _____________

(a) will be positive

(b) will be negative

(c) may be positive

(d) may be negative

I had been asked this question in exam.

My doubt stems from Transformer as a Magnetically Coupled Circuit topic in section Transformers of Electrical Machines

Answer 1

The correct option is (b) will be negative

Explanation: The leading p.f. has negative v.r.