Transformers The voltage transformation ratio of a transformer is equal to the ratio of secondary induced e.m.f. to primary induced e.m.f. secondary terminal voltage to primary applied voltage secondary current to primary current primary turns to secondary turns secondary induced e.m.f. to primary induced e.m.f. secondary terminal voltage to primary applied voltage secondary current to primary current primary turns to secondary turns ANSWER DOWNLOAD EXAMIANS APP
Transformers Transformer breaths in when load on it increases load remains constant load on it decreases None of these load on it increases load remains constant load on it decreases None of these ANSWER DOWNLOAD EXAMIANS APP
Transformers The steel used for transformer core has High silicon content High permeability Low hysteresis loss All of the listed here High silicon content High permeability Low hysteresis loss All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers Open circuit test on transformers is conducted to determine eddy current losses hysteresis losses copper losses core losses eddy current losses hysteresis losses copper losses core losses ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following is the main advantage of an auto-transformer over a two winding transformer? Hysteresis losses are reduced Saving in winding material Eddy losses are totally eliminated Copper losses are negligible Hysteresis losses are reduced Saving in winding material Eddy losses are totally eliminated Copper losses are negligible ANSWER DOWNLOAD EXAMIANS APP
Transformers The output current corresponding to the maximum efficiency for a transformer having core loss of 200 W and equivalent resistance referred to secondary of 0.5 Ω is 10 A 20 A 5 A 15 A 10 A 20 A 5 A 15 A ANSWER DOWNLOAD EXAMIANS APP
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