Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Auto transformer Current transformer Power transformer Potential transformer Auto transformer Current transformer Power transformer Potential transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers Efficiency of a power transformer is of the order of 100 per cent 50 per cent 98 per cent 25 per cent 100 per cent 50 per cent 98 per cent 25 per cent ANSWER DOWNLOAD EXAMIANS APP
Transformers An isolation transformer has primary to secondady turns ratio of 2:1 Can be any ratio 1:1 1:2 2:1 Can be any ratio 1:1 1:2 ANSWER DOWNLOAD EXAMIANS APP
Transformers In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues? 111.5 W 1,020 W 14.1 W 0 W 111.5 W 1,020 W 14.1 W 0 W ANSWER DOWNLOAD EXAMIANS APP
Transformers Distribution transformers are generally designed for maximum efficiency around 25% load Zero load 90% load 50% load 25% load Zero load 90% load 50% load ANSWER DOWNLOAD EXAMIANS APP
Transformers A common method of cooling a power transformer is natural air cooling Any of these oil cooling air blast cooling natural air cooling Any of these oil cooling air blast cooling ANSWER DOWNLOAD EXAMIANS APP
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