Question

How are the losses in the transformer and rotating machines converted to?

(a) the losses are converted to electrical energy

(b) the losses are converted to electrical and mechanical energy

(c) the losses are converted to mechanical energy

(d) the losses are converted to thermal energy

I got this question in an interview.

I'm obligated to ask this question of Temperature Rise in Transformers topic in portion Design of Transformers of Design of Electrical Machines

Answer 1

Correct answer is (d) the losses are converted to thermal energy

The best I can explain: In both the transformer and the rotating machines the losses are converted to thermal energy. This thermal energy causes heating of the transformer parts.