No-load on a transformer is carried out to determine______________?
Correct answer: C. magnetising current and loss
- A. copper loss
- B. magnetising current
- C. magnetising current and loss
- D. efficiency of the transformer
Explanation
The no-load, or open-circuit, test measures the small no-load current and the power drawn, which is approximately the transformer’s iron loss. Thus it gives both the magnetising current and core loss.
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