Transformers Distribution transformers are generally designed for maximum efficiency around 50% load Zero load 90% load 25% load 50% load Zero load 90% load 25% load ANSWER DOWNLOAD EXAMIANS APP
Transformers What is the coefficient of coupling for a transformer in which 4% of the total flux generated in the primary does not pass through the secondary? 9.6 0.96 0.4 4 9.6 0.96 0.4 4 ANSWER DOWNLOAD EXAMIANS APP
Transformers The mutual flux in a transformer remains constant at all loads because ______ Leakage flux is small Losses are small Iron core is used Applied voltage and frequency are constant Leakage flux is small Losses are small Iron core is used Applied voltage and frequency are constant ANSWER DOWNLOAD EXAMIANS APP
Transformers In a transformer routine efficiency depends upon Both power factor and load current Load current Power factor of load Supply frequency Both power factor and load current Load current Power factor of load Supply frequency ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer is smallest? 2kVA, 400 Hz 2kVA, 200 Hz 2kVA, 500 Hz 2kVA, 50 Hz 2kVA, 400 Hz 2kVA, 200 Hz 2kVA, 500 Hz 2kVA, 50 Hz ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Current transformer Power transformer Potential transformer Auto transformer Current transformer Power transformer Potential transformer Auto transformer ANSWER DOWNLOAD EXAMIANS APP
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