Two Induction motors A and B are identical except that the air gap of motor 'A' is 50% greater than that of motor B then
- A. The no-load pf of Motor A will be better than that of Motor B
- B. The no-load pf of Motor A will be poorer than that of Motor B
- C. The core losses of Motor A will be more than those of Motor B
- D. The operating flux of Motor A will be smaller than that of Motor B
Answer: B. The no-load pf of Motor A will be poorer than that of Motor B
Explanation: A larger air gap increases magnetic circuit reluctance, requiring higher magnetizing current to establish operating flux. This lowers the no-load power factor of Motor A relative to Motor B.