Transformers Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is great than one less than one approximately equal to one None of these great than one less than one approximately equal to one None of these ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer operates poorly at very low frequencies because _____ Magnetising current is abnormally high Primary reactance is too much increased None of the listed here Permeability of core is increased Magnetising current is abnormally high Primary reactance is too much increased None of the listed here Permeability of core is increased ANSWER DOWNLOAD EXAMIANS APP
Transformers The path of the magnetic flux in transformer should have high resistance low resistance high reluctance low reactance high resistance low resistance high reluctance low reactance ANSWER DOWNLOAD EXAMIANS APP
Transformers If a power transformer is operated at very high frequencies, then ______ 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 Core losses will be excessive ANSWER DOWNLOAD EXAMIANS APP
Transformers The primary and secondary of a transformer are ______ coupled. Electrically and magnetically Electrically Magnetically None of the listed here Electrically and magnetically Electrically Magnetically None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers In Ns is the synchronous speed and s the slip, then actual running speed of an induction motor will be Ns (Ns-l)s (l-s)Ns s.N. Ns (Ns-l)s (l-s)Ns s.N. ANSWER DOWNLOAD EXAMIANS APP
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