Transformers A transformer transfers electrical energy from primary to secondary usually with a change in ______ Frequency Time period Voltage Power Frequency Time period Voltage Power ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Power transformer Potential transformer Current transformer Auto transformer Power transformer Potential transformer Current transformer Auto transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers In an auto transformer, the primary and secondary are _____ coupled. Magnetically as well as electrically Only electrically None of the listed here Only magnetically Magnetically as well as electrically Only electrically None of the listed here Only magnetically ANSWER DOWNLOAD EXAMIANS APP
Transformers Efficiency of a power transformer is of the order of 50 per cent 98 per cent 100 per cent 25 per cent 50 per cent 98 per cent 100 per cent 25 per cent ANSWER DOWNLOAD EXAMIANS APP
Transformers The eddy current loss in a transformer is directly proportional to _______. The supply frequency The flux density in the core Thickness of core lamination Square of thickness of core lamination The supply frequency The flux density in the core Thickness of core lamination Square of thickness of core lamination ANSWER DOWNLOAD EXAMIANS APP
Transformers A common method of cooling a power transformer is natural air cooling oil cooling air blast cooling Any of these natural air cooling oil cooling air blast cooling Any of these ANSWER DOWNLOAD EXAMIANS APP
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