21. In a transformer the resistance between its primary and secondary should be
22. Gas is usually not liberated due to dissociation of transformer oil unless the oil temperature exceeds
23. For given applied voltage, with the increase in frequency of the applied voltage
24. In an actual transformer the iron loss remains practically constant from noload to fullload because
25. The chemical used in breather is
26. In case of a double cage induction motor, the inner cage has
27. If the supply frequency to the transformer is increased, the iron loss will
28. The term 'cogging' is associated with
29. Minimum voltage regulation occurs when the power factor of the load is
30. The highest voltage for transmitting electrical power in India is
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