Question

What is effect of the secondary burden on the ratio error?

(a) ratio error is constant with secondary burden

(b) ratio error decreases with secondary burden

(c) ratio error increases with secondary burden

(d) depends on the supply voltage

The question was asked during an online exam.

The doubt is from Characteristics of Potential Transformers topic in portion Extension of Instrument Ranges of Electrical Measurements

Answer 1

Correct answer is (c) ratio error increases with secondary burden

For explanation I would say: As the secondary burden is increased, the ratio error also increases and becomes more negative. Ratio error varies linearly with respect to the change in the secondary burden.