Transformers The no load ratio of a 50 Hz single phase transformer is 6000/250 V. The maximum flux in the core is 0.06 Wb. What is the number of primary turns? 350 210 900 450 350 210 900 450 ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer is smallest? 2kVA, 50 Hz 2kVA, 400 Hz 2kVA, 200 Hz 2kVA, 500 Hz 2kVA, 50 Hz 2kVA, 400 Hz 2kVA, 200 Hz 2kVA, 500 Hz ANSWER DOWNLOAD EXAMIANS APP
Transformers If a power transformer is operated at very high frequencies, then ______ Primary reactance is too much increased None of the listed here Core losses will be excessive Primary will draw large power Primary reactance is too much increased None of the listed here Core losses will be excessive Primary will draw large power ANSWER DOWNLOAD EXAMIANS APP
Transformers The core type transformer provides _______ Shorter magnetic path Much longer magnetic path Lesser average length per turn None of the listed here Shorter magnetic path Much longer magnetic path Lesser average length per turn None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers Open circuit test on transformers is conducted to determine copper losses eddy current losses hysteresis losses core losses copper losses eddy current losses hysteresis losses core losses ANSWER DOWNLOAD EXAMIANS APP
Transformers A no-load test is performed on a transformer to determine efficiency magnetising current and loss core loss copper loss magnetising current efficiency magnetising current and loss core loss copper loss magnetising current ANSWER DOWNLOAD EXAMIANS APP
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