The no load current in a transformer lags behind the applied voltage by an angle of about_____________?
Correct answer: C. 90°
- A. 180°
- B. 120″
- C. 90°
- D. 75°
Explanation
At no load, the transformer current is mainly the magnetizing component, which is nearly 90° behind the applied voltage. The small in-phase core-loss component makes the actual angle slightly less than 90°.
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