Transformers A transformer operates poorly at very low frequencies because _____ Primary reactance is too much increased Permeability of core is increased Magnetising current is abnormally high None of the listed here Primary reactance is too much increased Permeability of core is increased Magnetising current is abnormally high None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers To step 110 V ac down to 20 V ac, the turns ratio must be 0.018 5.5 18 0.18 0.018 5.5 18 0.18 ANSWER DOWNLOAD EXAMIANS APP
Transformers The highest voltage for transmitting electrical power in india is 33 kV 400 kV 132 kV 66 kV 33 kV 400 kV 132 kV 66 kV ANSWER DOWNLOAD EXAMIANS APP
Transformers For the parallel operation of single phase transformers it is necessary that they should have same polarity same efficiency same number of turns on the secondary side. same kVA rating same polarity same efficiency same number of turns on the secondary side. same kVA rating ANSWER DOWNLOAD EXAMIANS APP
Transformers In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of 15 A more than 15 A less than 15 A None of these 15 A more than 15 A less than 15 A None of these ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer is an efficient device because Uses electric coupling Uses capacitive coupling A static device Uses inductive coupling Uses electric coupling Uses capacitive coupling A static device Uses inductive coupling ANSWER DOWNLOAD EXAMIANS APP
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