Transformers The mutual inductance when k = 0.65, L1 = 2 H, and L2 = 5 H is 8 μH 2 mH 4 μH 2 μH 8 μH 2 mH 4 μH 2 μH ANSWER DOWNLOAD EXAMIANS APP
Transformers The mutual flux in a transformer remains constant at all loads because ______ Leakage flux is small Applied voltage and frequency are constant Iron core is used Losses are small Leakage flux is small Applied voltage and frequency are constant Iron core is used Losses are small ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer has 200 W as iron loss at full load. The iron loss at full load. The iron loss at half full load will be 400 W 50 W 200 W 100 W 400 W 50 W 200 W 100 W ANSWER DOWNLOAD EXAMIANS APP
Transformers The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 load. The turns ratio is 3:1. What is the secondary voltage? 18 V 180 V 2 V 20 V 18 V 180 V 2 V 20 V ANSWER DOWNLOAD EXAMIANS APP
Transformers The effect of leakage flux in a transformer is to ______ 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 None of the listed here Increase copper losses ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Current transformer Potential transformer Power transformer Auto transformer Current transformer Potential transformer Power transformer Auto transformer ANSWER DOWNLOAD EXAMIANS APP
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