Transformers The flux in the core of a single phase transformer is _____ Purely alternating one None of the listed here Purely rotating one Partly alternating and partly rotating Purely alternating one None of the listed here Purely rotating one Partly alternating and partly rotating ANSWER DOWNLOAD EXAMIANS APP
Transformers The permissible flux density in case of cold rolled grain oriented steel is around 3.7 Wb/m² 2.7 Wb/m² 4.7 Wb/m² 1.7 Wb/m² 3.7 Wb/m² 2.7 Wb/m² 4.7 Wb/m² 1.7 Wb/m² ANSWER DOWNLOAD EXAMIANS APP
Transformers The maximum flux produced in the core of a transformer is ______ None of the listed here Directly proportional to supply frequency Inversely proportional to primary voltage Inversely proportional to supply frequency None of the listed here Directly proportional to supply frequency Inversely proportional to primary voltage Inversely proportional to supply frequency ANSWER DOWNLOAD EXAMIANS APP
Transformers If a power transformer is operated at very high frequencies, then ______ Primary will draw large power Primary reactance is too much increased Core losses will be excessive None of the listed here Primary will draw large power Primary reactance is too much increased Core losses will be excessive None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following protection is normally not provided on small distribution transformers? Overfluxing protection All of these Overcurrent protection Buchholz relay Overfluxing protection All of these Overcurrent protection Buchholz relay ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following is the main advantage of an auto-transformer over a two winding transformer? Eddy losses are totally eliminated Hysteresis losses are reduced Saving in winding material Copper losses are negligible Eddy losses are totally eliminated Hysteresis losses are reduced Saving in winding material Copper losses are negligible ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS