41. Hysteresis loss in a transformer varies as (Bmax = maximum flux density)
42. The no load current in a transformer lags behind the applied voltage by an angle of about
43. The efficiency of two identical transformers under load conditions can be determined by
44. For a transformer, operating at constant load current, maximum efficiency will occur at
45. Helical coils can be used on
46. Greater the secondary leakage flux
47. A transformer core is laminated to
48. In the transformer following winding has got more cross-sectional area
49. The transformer laminations are insulated from each other by
50. Buchholz's relay gives warning and protection against
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