Transformers A transformer operates poorly at very low frequencies because _____ Magnetising current is abnormally high Primary reactance is too much increased Permeability of core is increased None of the listed here Magnetising current is abnormally high Primary reactance is too much increased Permeability of core is increased None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 . The load resistance as seen by the source is 7.8 Ω 78 Ω 1.3 Ω 13 Ω 7.8 Ω 78 Ω 1.3 Ω 13 Ω ANSWER DOWNLOAD EXAMIANS APP
Transformers The main reason for generation of harmonics in a transformer could be fluctuating load saturation of core poor insulation mechanical vibrations fluctuating load saturation of core poor insulation mechanical vibrations ANSWER DOWNLOAD EXAMIANS APP
Transformers Negative voltage regulation is indicative that the load is inductive only None of these inductive or resistive capacitive only inductive only None of these inductive or resistive capacitive only ANSWER DOWNLOAD EXAMIANS APP
Transformers The noise resulting from vibrations of laminations set by magnetic forces, is termed as Hum Boo Magnetostriction Zoom Hum Boo Magnetostriction Zoom ANSWER DOWNLOAD EXAMIANS APP
Transformers Leakage flux in a transformer occurs because Transformer is not an efficient device Applied voltage is sinusoidal Iron core has high permeability Air is not a good magnetic insulator Transformer is not an efficient device Applied voltage is sinusoidal Iron core has high permeability Air is not a good magnetic insulator ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS