Question

What will happen if we increase the air gap in the induction motor?

(a) Power factor will reduce

(b) Power factor will increase

(c) Reduction in harmonics

(d) Speed will increase

I got this question by my college professor while I was bunking the class.

This interesting question is from Induction Motors topic in chapter Braking of DC Motors & Induction Motors of Electric Drives

Answer 1

The correct answer is (a) Power factor will reduce

To explain I would say: If we increase the air gap in the induction motor, the machine will draw more magnetizing current to maintain flux in the air gap. The power factor of the machine will reduce.