Transformers A transformer operates poorly at very low frequencies because _____ Primary reactance is too much increased Magnetising current is abnormally high None of the listed here Permeability of core is increased Primary reactance is too much increased Magnetising current is abnormally high None of the listed here Permeability of core is increased ANSWER DOWNLOAD EXAMIANS APP
Transformers Losses which occur in rotating electric machines and do not occur in trans formers are magnetic losses copper losses hysteresis and eddy current losses friction and windage losses magnetic losses copper losses hysteresis and eddy current losses friction and windage losses ANSWER DOWNLOAD EXAMIANS APP
Transformers An isolation transformer has primary to secondady turns ratio of 2:1 1:1 Can be any ratio 1:2 2:1 1:1 Can be any ratio 1:2 ANSWER DOWNLOAD EXAMIANS APP
Transformers The leakage flux in a transformer depends upon load current, voltage and frequency load current load current and voltage load current, voltage, frequency and power factor load current, voltage and frequency load current load current and voltage load current, voltage, frequency and power factor ANSWER DOWNLOAD EXAMIANS APP
Transformers An open-circuit test on a transformer is conducted primarily to measure copper loss insulation resistance core loss total loss copper loss insulation resistance core loss total loss ANSWER DOWNLOAD EXAMIANS APP
Transformers The primary winding of a transformer has 110 V ac across it. What is the secondary voltage if the turns ratio is 8? 8.8 V 8,800 V 88 V 880 V 8.8 V 8,800 V 88 V 880 V ANSWER DOWNLOAD EXAMIANS APP
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