Transformers If a power transformer is operated at very high frequencies, then ______ None of the listed here Primary will draw large power Core losses will be excessive Primary reactance is too much increased None of the listed here Primary will draw large power Core losses will be excessive Primary reactance is too much increased ANSWER DOWNLOAD EXAMIANS APP
Transformers The primary leakage flux links _____ Secondary winding only None of the listed here Primary winding only Both primary and secondary windings Secondary winding only None of the listed here Primary winding only Both primary and secondary windings ANSWER DOWNLOAD EXAMIANS APP
Transformers Transformer having ratings less than 5kVA are generally ______ Natural air cooled Oil cooled Water cooled None of the listed here Natural air cooled Oil cooled Water cooled None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers The mutual inductance when k = 0.65, L1 = 2 H, and L2 = 5 H is 8 μH 2 mH 4 μH 2 μH 8 μH 2 mH 4 μH 2 μH ANSWER DOWNLOAD EXAMIANS APP
Transformers The efficiency of a transformer will be maximum when ______ Leakage reactance of the two winding Copper loss is equal to constant loss Resistance of the two winding are equal None of the listed here Leakage reactance of the two winding Copper loss is equal to constant loss Resistance of the two winding are equal None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers The main reason for generation of harmonics in a transformer could be saturation of core poor insulation fluctuating load mechanical vibrations saturation of core poor insulation fluctuating load mechanical vibrations ANSWER DOWNLOAD EXAMIANS APP
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