Transformers Leakage flux in a transformer occurs because Applied voltage is sinusoidal Iron core has high permeability Transformer is not an efficient device Air is not a good magnetic insulator Applied voltage is sinusoidal Iron core has high permeability Transformer is not an efficient device Air is not a good magnetic insulator ANSWER DOWNLOAD EXAMIANS APP
Transformers The efficiency of a transformer will be maximum when ______ Resistance of the two winding are equal Leakage reactance of the two winding None of the listed here Copper loss is equal to constant loss Resistance of the two winding are equal Leakage reactance of the two winding None of the listed here Copper loss is equal to constant loss ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer is smallest? 2kVA, 500 Hz 2kVA, 200 Hz 2kVA, 50 Hz 2kVA, 400 Hz 2kVA, 500 Hz 2kVA, 200 Hz 2kVA, 50 Hz 2kVA, 400 Hz ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following property is not necessarily desirable in the material for transformer core? High thermal conductivity High permeability Low hysteresis loss Mechanical strength High thermal conductivity High permeability Low hysteresis loss Mechanical strength ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following acts as a protection against high voltage surges due to lightning and switching? Thermal overload relays Conservator Breather Horn gaps Thermal overload relays Conservator Breather Horn gaps ANSWER DOWNLOAD EXAMIANS APP
Transformers The permissible flux density in case of cold rolled grain oriented steel is around 3.7 Wb/m² 4.7 Wb/m² 2.7 Wb/m² 1.7 Wb/m² 3.7 Wb/m² 4.7 Wb/m² 2.7 Wb/m² 1.7 Wb/m² ANSWER DOWNLOAD EXAMIANS APP
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