11. Iron loss of a transformer can be measured by
12. Efficiency of a power transformer is of the order of
13. Which of the following property is not necessarily desirable in the material for transformer core?
14. Which of the following properties is not necessarily desirable for the material for transformer core?
15. Natural air cooling is generally restricted for transformers up to
16. Reduction in core losses and increase in permeability are obtained with transformer employing
17. Harmonics in transformer result in
18. The efficiency of a transformer, under heavy loads, is comparatively low because
19. In a power or distribution transformer about 10 per cent end turns are heavily insulated
20. Which winding in a transformer has more number of turns?
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