Transformers In which of the following transformer part of primary winding also serves as the secondary winding? Current transformer Step-up transformer Auto transformer Potential transformer Current transformer Step-up transformer Auto transformer Potential transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers If a power transformer is operated at very high frequencies, then ______ None of the listed here Primary will draw large power Core losses will be excessive Primary reactance is too much increased None of the listed here Primary will draw large power Core losses will be excessive Primary reactance is too much increased ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer is an efficient device because it _______ Uses capacitive coupling Uses inductive coupling Uses electric coupling Is a static device Uses capacitive coupling Uses inductive coupling Uses electric coupling Is a static device ANSWER DOWNLOAD EXAMIANS APP
Transformers The effect of leakage flux in a transformer is to ______ None of the listed here Decreases copper losses Increase copper losses Cause voltage drop in the windings None of the listed here Decreases copper losses Increase copper losses Cause voltage drop in the windings ANSWER DOWNLOAD EXAMIANS APP
Transformers If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ? 250 Ω 6250 Ω 25 Ω 62500 Ω 250 Ω 6250 Ω 25 Ω 62500 Ω ANSWER DOWNLOAD EXAMIANS APP
Transformers The highest voltage for transmitting electrical power in india is 132 kV 66 kV 33 kV 400 kV 132 kV 66 kV 33 kV 400 kV ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS