Question

A 1-phase tranformer has a leakage impedance of 1+ j4 Ω for primary and 3+ j11 Ω for secondary windings. This transformer has __________

(a) H.V primary

(b) Medium voltage primary

(c) L.V primary

(d) L.V secondary

I got this question in an international level competition.

This is a very interesting question from Autotransformers topic in chapter Transformers of Electrical Machines

Answer 1

The correct answer is (c) L.V primary

Easy explanation: The side which has lower impedance will have lower number of turns and so the low voltage side.