No-load current in a transformer________________?
Correct answer: A. lags behind the voltage by about 75°
- A. lags behind the voltage by about 75°
- B. leads the voltage by about 75°
- C. lags behind the voltage by about 15°
- D. leads the voltage by about 15°
Explanation
The no-load current is mainly magnetising current, which lags the applied voltage by nearly 90°, but the in-phase core-loss component reduces the practical angle to about 75°. Therefore it lags the voltage.
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