Question

If a transformer is at no load, then it will act like __________

(a) a resistor at p.f = 0

(b) an inductive reactor at 0.2 lagging

(c) a capacitive reactor at0.2 leading

(d) an inductive reactor at 0.8 lagging

The question was asked in examination.

The above asked question is from Autotransformers in section Transformers of Electrical Machines

Answer 1

The correct answer is (b) an inductive reactor at 0.2 lagging

To explain I would say: Transformer is nothing but the arranged windings which are magnetically coupled. The windings will inductive predominantly with very low resistance.