Question

A 10 kVA, 400/200 V, 1-phase transformer with 2% resistance and 2% leakage reactance. It draws steady short circuit current at which angle?

(a) 45°

(b) 75°

(c) 135°

(d) 0°

I got this question in an interview.

Query is from Voltage Regulation of Transformer topic in portion Transformers of Electrical Machines

Answer 1

Right answer is (a) 45°

To explain: The power factor angle will be atan(x/r) = 45°.