Transformers The voltage transformation ratio of a transformer is equal to the ratio of 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 secondary terminal voltage to primary applied voltage ANSWER DOWNLOAD EXAMIANS APP
Transformers Efficiency of a power transformer is of the order of 50 per cent 25 per cent 100 per cent 98 per cent 50 per cent 25 per cent 100 per cent 98 per cent ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following property is not necessarily desirable in the material for transformer core? High permeability High thermal conductivity Mechanical strength Low hysteresis loss High permeability High thermal conductivity Mechanical strength Low hysteresis loss ANSWER DOWNLOAD EXAMIANS APP
Transformers Natural air cooling is generally restricted for transformers up to 5 MVA 50 MVA 1.5 MVA 15 MVA 5 MVA 50 MVA 1.5 MVA 15 MVA ANSWER DOWNLOAD EXAMIANS APP
Transformers Harmonics in transformer result in All of the listed here increased core losses increased I2R losses magnetic interference with communication circuits All of the listed here increased core losses increased I2R losses magnetic interference with communication circuits ANSWER DOWNLOAD EXAMIANS APP
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