Transformers The voltage transformation ratio of a transformer is equal to the ratio of secondary terminal voltage to primary applied voltage secondary current to primary current secondary induced e.m.f. to primary induced e.m.f. primary turns to secondary turns secondary terminal voltage to primary applied voltage secondary current to primary current secondary induced e.m.f. to primary induced e.m.f. primary turns to secondary turns ANSWER DOWNLOAD EXAMIANS APP
Transformers The approximate efficiency of a large transformer is 50% 80% 95% 65% 50% 80% 95% 65% ANSWER DOWNLOAD EXAMIANS APP
Transformers Which motor is preferred for use in mines where explosive gases exist? Induction motor Shunt motor Synchronous motor Air motor Induction motor Shunt motor Synchronous motor Air motor ANSWER DOWNLOAD EXAMIANS APP
Transformers The permissible flux density in case of cold rolled grain oriented steel is around 3.7 Wb/m² 4.7 Wb/m² 2.7 Wb/m² 1.7 Wb/m² 3.7 Wb/m² 4.7 Wb/m² 2.7 Wb/m² 1.7 Wb/m² ANSWER DOWNLOAD EXAMIANS APP
Transformers Primary winding of a transformer could either be a low voltage or high voltage winding is always a low voltage winding None of these is always a high voltage winding could either be a low voltage or high voltage winding is always a low voltage winding None of these is always a high voltage winding ANSWER DOWNLOAD EXAMIANS APP
Transformers The core type transformer provides _______ None of the listed here Lesser average length per turn Much longer magnetic path Shorter magnetic path None of the listed here Lesser average length per turn Much longer magnetic path Shorter magnetic path ANSWER DOWNLOAD EXAMIANS APP
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