21. What will happen if the transformers working in parallel are not connected with regard to polarity?
22. Transformer breaths in when
23. Material used for construction of transformer core is usually
24. Natural oil cooling is used for transformers up to a rating of
25. The maximum load that a power transformer can carry is limited by its
26. Which of the following is the most likely source of harmonics in a transformer?
27. The leakage flux in a transformer depends upon
28. The noise produced by a transformer is termed as
29. A no-load test is performed on a transformer to determine
30. Which of the following parts of a transformer is visible from outside?
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