The voltage applied to a transformer primary is increased keeping v/f fixed. How will core loss and magnetizing current change?
- A. Core loss will increase and magnetizing current remain same
- B. Core loss will remain same and magnetizing current will remain same
- C. Core loss will decrease and magnetizing current will increase
- D. Core loss will remain same and magnetizing current will decrease
Answer: A. Core loss will increase and magnetizing current remain same
Explanation: Keeping V/f constant keeps peak flux density Bm constant (since Bm ∝ V/f). Magnetizing current remains constant, while core loss increases due to higher frequency (Wh ∝ f, We ∝ f²).