Transformers For the parallel operation of single phase transformers it is necessary that they should have same kVA rating same number of turns on the secondary side. same efficiency same polarity same kVA rating same number of turns on the secondary side. same efficiency same polarity ANSWER DOWNLOAD EXAMIANS APP
Transformers By laminating the core of a transformer, we decrease _____ Copper loss Eddy current loss Hysteresis loss Leakage reactance Copper loss Eddy current loss Hysteresis loss Leakage reactance ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer operates poorly at very low frequencies because _____ Magnetising current is abnormally high Primary reactance is too much increased None of the listed here Permeability of core is increased Magnetising current is abnormally high Primary reactance is too much increased None of the listed here Permeability of core is increased ANSWER DOWNLOAD EXAMIANS APP
Transformers In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues? 14.1 W 0 W 111.5 W 1,020 W 14.1 W 0 W 111.5 W 1,020 W ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Current transformer Auto transformer Power transformer Potential transformer Current transformer Auto transformer Power transformer Potential transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following is the main advantage of an auto-transformer over a two winding transformer? Copper losses are negligible Hysteresis losses are reduced Saving in winding material Eddy losses are totally eliminated Copper losses are negligible Hysteresis losses are reduced Saving in winding material Eddy losses are totally eliminated ANSWER DOWNLOAD EXAMIANS APP
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