Transformers The maximum efficiency of a distribution transformer is at 80% full load at full load at 50% full load at no load at 80% full load at full load at 50% full load at no load ANSWER DOWNLOAD EXAMIANS APP
Transformers The mutual inductance when k = 0.65, L1 = 2 H, and L2 = 5 H is 8 μH 2 μH 2 mH 4 μH 8 μH 2 μH 2 mH 4 μH 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 more than 15 A less than 15 A 15 A None of these more than 15 A less than 15 A 15 A None of these ANSWER DOWNLOAD EXAMIANS APP
Transformers How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V? 90 V 900 V 9 V 0.9 V 90 V 900 V 9 V 0.9 V ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer transfers electrical energy from primary to secondary usually with a change in ______ Voltage Time period Power Frequency Voltage Time period Power Frequency ANSWER DOWNLOAD EXAMIANS APP
Transformers The effect of leakage flux in a transformer is to ______ None of the listed here Increase copper losses Cause voltage drop in the windings Decreases copper losses None of the listed here Increase copper losses Cause voltage drop in the windings Decreases copper losses ANSWER DOWNLOAD EXAMIANS APP
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