Transformers In an auto transformer, the primary and secondary are _____ coupled. None of the listed here Magnetically as well as electrically Only magnetically Only electrically None of the listed here Magnetically as well as electrically Only magnetically Only electrically ANSWER DOWNLOAD EXAMIANS APP
Transformers In a transformer the resistance between its primary and secondary is 1 ohm Zero 1000 ohms Infinite 1 ohm Zero 1000 ohms Infinite ANSWER DOWNLOAD EXAMIANS APP
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? 210 350 900 450 210 350 900 450 ANSWER DOWNLOAD EXAMIANS APP
Transformers The maximum flux produced in the core of a transformer is ______ Inversely proportional to primary voltage None of the listed here Inversely proportional to supply frequency Directly proportional to supply frequency Inversely proportional to primary voltage None of the listed here Inversely proportional to supply frequency Directly proportional to supply frequency ANSWER DOWNLOAD EXAMIANS APP
Transformers No-load on a transformer is carried out to determine efficiency of the transformer magnetising current copper loss magnetising current and loss efficiency of the transformer magnetising current copper loss magnetising current and loss ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer operates poorly at very low frequencies because _____ Permeability of core is increased None of the listed here Primary reactance is too much increased Magnetising current is abnormally high Permeability of core is increased None of the listed here Primary reactance is too much increased Magnetising current is abnormally high ANSWER DOWNLOAD EXAMIANS APP
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