Question

What is the potential transformer?

(a) transformer used with an D.C. ammeter

(b) transformer used with an A.C. voltmeter

(c) transformer used with an D.C. ammeter

(d) transformer used with an A.C. voltmeter

This question was posed to me in semester exam.

I'm obligated to ask this question of Instrument Transformers in division Extension of Instrument Ranges of Electrical Measurements

Answer 1

The correct choice is (b) transformer used with an A.C. voltmeter

To explain I would say: A transformer used to extend the range of an A.C. voltmeter is known as a potential transformer. A potential transformer is also abbreviated as P.T.