Transformers The iron core is used to ______of the transformer. Increase the wight Provide tight magnetic coupling None of the listed here Reduce core loss Increase the wight Provide tight magnetic coupling None of the listed here Reduce core loss ANSWER DOWNLOAD EXAMIANS APP
Transformers The efficiency of a transformer, under heavy loads, is comparatively low because secondary output is much less as compared to primary input copper loss becomes high in proportion to the output iron loss is increased considerably voltage drop both in primary and secondary becomes large secondary output is much less as compared to primary input copper loss becomes high in proportion to the output iron loss is increased considerably voltage drop both in primary and secondary becomes large ANSWER DOWNLOAD EXAMIANS APP
Transformers A certain transformer has a turns ratio of 1 and a 0.85 coefficient of coupling. When 2 V ac is applied to the primary, the secondary voltage is 0 V 1 V 1.7 V 0.85 V 0 V 1 V 1.7 V 0.85 V ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Auto transformer Potential transformer Current transformer Power transformer Auto transformer Potential transformer Current transformer Power transformer 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 A transformer does not posses ______changing property. Power Current Voltage Impedance Power Current Voltage Impedance ANSWER DOWNLOAD EXAMIANS APP
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