Transformers The hum in a transformer is mainly attributed to mechanical vibrations magnetostriction oil in the transformer load changes mechanical vibrations magnetostriction oil in the transformer load changes ANSWER DOWNLOAD EXAMIANS APP
Transformers Losses which occur in rotating electric machines and do not occur in trans formers are magnetic losses hysteresis and eddy current losses copper losses friction and windage losses magnetic losses hysteresis and eddy current losses copper losses friction and windage losses ANSWER DOWNLOAD EXAMIANS APP
Transformers Sumpner's test is conducted on transformer to determine Stray losses None of the listed here Temperature All day efficiency Stray losses None of the listed here Temperature All day efficiency ANSWER DOWNLOAD EXAMIANS APP
Transformers The primary leakage flux links _____ Primary winding only Secondary winding only None of the listed here Both primary and secondary windings Primary winding only Secondary winding only None of the listed here Both primary and secondary windings ANSWER DOWNLOAD EXAMIANS APP
Transformers What is the coefficient of coupling for a transformer in which 4% of the total flux generated in the primary does not pass through the secondary? 0.4 9.6 0.96 4 0.4 9.6 0.96 4 ANSWER DOWNLOAD EXAMIANS APP
Transformers The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 load. The turns ratio is 3:1. What is the secondary voltage? 20 V 18 V 180 V 2 V 20 V 18 V 180 V 2 V ANSWER DOWNLOAD EXAMIANS APP
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