Question

How many types are the additional losses in iron classified into?

(a) 2

(b) 3

(c) 4

(d) 5

This question was addressed to me in an interview.

I need to ask this question from Losses and Efficiency topic in chapter Three Phase Induction Motor of Design of Electrical Machines

Answer 1

Correct answer is (a) 2

For explanation I would say: The additional iron losses are classified into 2 types. They are i) pulsation losses and ii) surface losses.