Transformers A transformer transfers electrical energy from primary to secondary usually with a change in ______ Power Time period Voltage Frequency Power Time period Voltage Frequency 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 The main reason for generation of harmonics in a transformer could be mechanical vibrations fluctuating load saturation of core poor insulation mechanical vibrations fluctuating load saturation of core poor insulation ANSWER DOWNLOAD EXAMIANS APP
Transformers Material used for construction of transformer core is usually Copper Aluminium Wood Silicon steel Copper Aluminium Wood Silicon steel ANSWER DOWNLOAD EXAMIANS APP
Transformers Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is less than one approximately equal to one great than one None of these less than one approximately equal to one great than one None of these ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer operates poorly at very low frequencies because _____ 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 Permeability of core is increased None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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