Transformers The no load ratio of a 50 Hz single phase transformer is 6000/250 V. The maximum flux in the core is 0.06 Wb. What is the number of primary turns? 210 900 450 350 210 900 450 350 ANSWER DOWNLOAD EXAMIANS APP
Transformers Natural air cooling is generally restricted for transformers up to 50 MVA 1.5 MVA 5 MVA 15 MVA 50 MVA 1.5 MVA 5 MVA 15 MVA ANSWER DOWNLOAD EXAMIANS APP
Transformers The efficiency of a transformer, under heavy loads, is comparatively low because iron loss is increased considerably secondary output is much less as compared to primary input voltage drop both in primary and secondary becomes large copper loss becomes high in proportion to the output iron loss is increased considerably secondary output is much less as compared to primary input voltage drop both in primary and secondary becomes large copper loss becomes high in proportion to the output ANSWER DOWNLOAD EXAMIANS APP
Transformers The noise produced by a transformer is termed as zoom ringing hum buzz zoom ringing hum buzz ANSWER DOWNLOAD EXAMIANS APP
Transformers If a power transformer is operated at very high frequencies, then ______ Primary will draw large power Core losses will be excessive Primary reactance is too much increased None of the listed here Primary will draw large power Core losses will be excessive Primary reactance is too much increased None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers An isolation transformer has primary to secondady turns ratio of 1:2 Can be any ratio 1:1 2:1 1:2 Can be any ratio 1:1 2:1 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS