If a transformer is switched on to a voltage more than the rated voltage______________?
Correct answer: A. its power factor will deteriorate
- A. its power factor will deteriorate
- B. its power factor will increase
- C. its power factor will remain unaffected
- D. its power factor will be zero
Explanation
Excess voltage raises the core flux and may drive it toward saturation, causing a sharp increase in exciting current. This current becomes more reactive, so the transformer power factor deteriorates.
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