Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Current transformer Potential transformer Auto transformer Power transformer Current transformer Potential transformer Auto transformer Power transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer has full load copper loss of 400 W. The copper loss at half full load will be _____. None of the listed here 100 W 400 W 200 W None of the listed here 100 W 400 W 200 W ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following is the main advantage of an auto-transformer over a two winding transformer? Saving in winding material Hysteresis losses are reduced Eddy losses are totally eliminated Copper losses are negligible Saving in winding material Hysteresis losses are reduced Eddy losses are totally eliminated Copper losses are negligible 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? 4 0.4 0.96 9.6 4 0.4 0.96 9.6 ANSWER DOWNLOAD EXAMIANS APP
Transformers Losses which occur in rotating electric machines and do not occur in trans formers are copper losses magnetic losses hysteresis and eddy current losses friction and windage losses copper losses magnetic losses hysteresis and eddy current losses friction and windage losses ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer does not posses ______changing property. Current Impedance Voltage Power Current Impedance Voltage Power ANSWER DOWNLOAD EXAMIANS APP
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