Transformers The efficiency of a transformer, under heavy loads, is comparatively low because copper loss becomes high in proportion to the output iron loss is increased considerably voltage drop both in primary and secondary becomes large secondary output is much less as compared to primary input copper loss becomes high in proportion to the output iron loss is increased considerably voltage drop both in primary and secondary becomes large secondary output is much less as compared to primary input ANSWER DOWNLOAD EXAMIANS APP
Transformers If a transformer core has air gaps, then, _________ Reluctance of magnetic path is decreased Magnetising current is greatly increased Eddy current is increased Hysteresis loss is decreased Reluctance of magnetic path is decreased Magnetising current is greatly increased Eddy current is increased Hysteresis loss is decreased ANSWER DOWNLOAD EXAMIANS APP
Transformers The dielectric strength of transformer oil is expected to be lkV 33 kV 330 kV 100 kV lkV 33 kV 330 kV 100 kV ANSWER DOWNLOAD EXAMIANS APP
Transformers The main reason for generation of harmonics in a transformer could be fluctuating load poor insulation saturation of core mechanical vibrations fluctuating load poor insulation saturation of core mechanical vibrations ANSWER DOWNLOAD EXAMIANS APP
Transformers By laminating the core of a transformer, we decrease _____ Copper loss Eddy current loss Leakage reactance Hysteresis loss Copper loss Eddy current loss Leakage reactance Hysteresis loss ANSWER DOWNLOAD EXAMIANS APP
Transformers In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is one-fourth the primary current equal to the primary current four times the primary current one-fourth the primary current and equal to the primary current one-fourth the primary current equal to the primary current four times the primary current one-fourth the primary current and equal to the primary current ANSWER DOWNLOAD EXAMIANS APP
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