Transformers An isolation transformer has primary to secondady turns ratio of 2:1 1:2 Can be any ratio 1:1 2:1 1:2 Can be any ratio 1:1 ANSWER DOWNLOAD EXAMIANS APP
Transformers The efficiency of a transformer, under heavy loads, is comparatively low because voltage drop both in primary and secondary becomes large iron loss is increased considerably copper loss becomes high in proportion to the output secondary output is much less as compared to primary input voltage drop both in primary and secondary becomes large iron loss is increased considerably copper loss becomes high in proportion to the output secondary output is much less as compared to primary input ANSWER DOWNLOAD EXAMIANS APP
Transformers The steel used for transformer core has All of the listed here High silicon content High permeability Low hysteresis loss All of the listed here High silicon content High permeability Low hysteresis loss ANSWER DOWNLOAD EXAMIANS APP
Transformers In a power or distribution transformer about 10 per cent end turns are heavily insulated to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns to reflect the line surge and save the winding of a transformer from damage None of these to absorb the line surge voltage and save the winding of transformer from damage to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns to reflect the line surge and save the winding of a transformer from damage None of these to absorb the line surge voltage and save the winding of transformer from damage ANSWER DOWNLOAD EXAMIANS APP
Transformers In a transformer routine efficiency depends upon Power factor of load Both power factor and load current Load current Supply frequency Power factor of load Both power factor and load current Load current Supply frequency ANSWER DOWNLOAD EXAMIANS APP
Transformers The main reason for generation of harmonics in a transformer could be fluctuating load mechanical vibrations poor insulation saturation of core fluctuating load mechanical vibrations poor insulation saturation of core ANSWER DOWNLOAD EXAMIANS APP
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