Question

In the lab, two students X and Y conducted the experiments to verify the name plate ratings of the transformer.But student X conducted the same at higher frequency. The kVA reading of student X will be ___________

(a) higher than Y’s reading

(b) lower than Y’s reading

(c) same as Y’s reading

(d) none of the mentioned

This question was posed to me in an interview.

The doubt is from Machine Ratings topic in division Rating and Loss Dissipation of Electrical Machines

Answer 1

Correct answer is (a) higher than Y’s reading

To elaborate: As rating is directly proportional to the frequency of operation.