Transformers Losses which occur in rotating electric machines and do not occur in trans formers are copper losses friction and windage losses magnetic losses hysteresis and eddy current losses copper losses friction and windage losses magnetic losses hysteresis and eddy current losses ANSWER DOWNLOAD EXAMIANS APP
Transformers If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ? 250 Ω 25 Ω 6250 Ω 62500 Ω 250 Ω 25 Ω 6250 Ω 62500 Ω 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 Copper losses are negligible Hysteresis losses are reduced Eddy losses are totally eliminated Saving in winding material Copper losses are negligible Hysteresis losses are reduced Eddy losses are totally eliminated ANSWER DOWNLOAD EXAMIANS APP
Transformers The path of the magnetic flux in transformer should have high resistance high reluctance low resistance low reactance high resistance high reluctance low resistance low reactance ANSWER DOWNLOAD EXAMIANS APP
Transformers Which motor is preferred for use in mines where explosive gases exist? Synchronous motor Induction motor Air motor Shunt motor Synchronous motor Induction motor Air motor Shunt motor ANSWER DOWNLOAD EXAMIANS APP
Transformers A Buchholz relay can be installed on Welding transformer Oil cooled transformer Auto transformer Air-cooled transformer Welding transformer Oil cooled transformer Auto transformer Air-cooled transformer ANSWER DOWNLOAD EXAMIANS APP
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