Transformers Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is None of these great than one approximately equal to one less than one None of these great than one approximately equal to one less than one ANSWER DOWNLOAD EXAMIANS APP
Transformers A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is 0.2 0.4 25 5 0.2 0.4 25 5 ANSWER DOWNLOAD EXAMIANS APP
Transformers If a power transformer is operated at very high frequencies, then ______ Core losses will be excessive Primary will draw large power None of the listed here Primary reactance is too much increased Core losses will be excessive Primary will draw large power None of the listed here Primary reactance is too much increased ANSWER DOWNLOAD EXAMIANS APP
Transformers In which of the following transformer part of primary winding also serves as the secondary winding? Auto transformer Potential transformer Current transformer Step-up transformer Auto transformer Potential transformer Current transformer Step-up transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers A step up transformer increases Frequency Power Voltage Current Frequency Power Voltage Current ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer is smallest? 2kVA, 500 Hz 2kVA, 50 Hz 2kVA, 400 Hz 2kVA, 200 Hz 2kVA, 500 Hz 2kVA, 50 Hz 2kVA, 400 Hz 2kVA, 200 Hz ANSWER DOWNLOAD EXAMIANS APP
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