Transformers Which of the following is the main advantage of an auto-transformer over a two winding transformer? Saving in winding material Eddy losses are totally eliminated Hysteresis losses are reduced Copper losses are negligible Saving in winding material Eddy losses are totally eliminated Hysteresis losses are reduced Copper losses are negligible ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following property is not necessarily desirable in the material for transformer core? Low hysteresis loss Mechanical strength High thermal conductivity High permeability Low hysteresis loss Mechanical strength High thermal conductivity High permeability ANSWER DOWNLOAD EXAMIANS APP
Transformers If a transformer core has air gaps, then, _________ Magnetising current is greatly increased Reluctance of magnetic path is decreased Eddy current is increased Hysteresis loss is decreased Magnetising current is greatly increased Reluctance of magnetic path is decreased Eddy current is increased Hysteresis loss is decreased ANSWER DOWNLOAD EXAMIANS APP
Transformers The principle of working of transformer is Dynamic induction Self induction Static induction Mutual induction Dynamic induction Self induction Static induction Mutual induction ANSWER DOWNLOAD EXAMIANS APP
Transformers Open circuit test on transformers is conducted to determine hysteresis losses core losses eddy current losses copper losses hysteresis losses core losses eddy current losses copper losses ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer operates poorly at very low frequencies because _____ Permeability of core is increased Primary reactance is too much increased None of the listed here Magnetising current is abnormally high Permeability of core is increased Primary reactance is too much increased None of the listed here Magnetising current is abnormally high ANSWER DOWNLOAD EXAMIANS APP
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