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