Question

What is the relation between the ideal short circuit current and the number of poles?

(a) short circuit current is directly proportional to the number of poles

(b) short circuit current is directly proportional to the square of the number of poles

(c) short circuit current is indirectly proportional to the number of poles

(d) short circuit current is indirectly proportional to the square of the number of poles

I had been asked this question in an interview for internship.

My doubt is from Dispersion Coefficient topic in portion Three Phase Induction Motor of Design of Electrical Machines

Answer 1

Right choice is (c) short circuit current is indirectly proportional to the number of poles

Easy explanation: The ideal short circuit current is indirectly proportional to the number of poles. As the number of poles increases, the ideal short circuit current decreases.