Transformers The hum in a transformer is mainly attributed to magnetostriction oil in the transformer mechanical vibrations load changes magnetostriction oil in the transformer mechanical vibrations load changes ANSWER DOWNLOAD EXAMIANS APP
Transformers The flux in the core of a single phase transformer is _____ Partly alternating and partly rotating Purely rotating one Purely alternating one None of the listed here Partly alternating and partly rotating Purely rotating one Purely alternating one None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers Harmonics in transformer result in increased core losses increased I2R losses magnetic interference with communication circuits All of the listed here increased core losses increased I2R losses magnetic interference with communication circuits All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers The maximum flux produced in the core of a transformer is ______ Inversely proportional to supply frequency Directly proportional to supply frequency None of the listed here Inversely proportional to primary voltage Inversely proportional to supply frequency Directly proportional to supply frequency None of the listed here Inversely proportional to primary voltage ANSWER DOWNLOAD EXAMIANS APP
Transformers What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV? 8 kVA 0.25 kVA 4 kVA 16 kVA 8 kVA 0.25 kVA 4 kVA 16 kVA 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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