Transformers The efficiencies of transformers compared with that of electric motors of the same power are much smaller about the same much higher somewhat smaller much smaller about the same much higher somewhat smaller ANSWER DOWNLOAD EXAMIANS APP
Transformers The all day efficiency of a transformer is ______ the commercial efficiency. Less than More than The same as None of the listed here Less than More than The same as None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers The no load primary current is about ______of full load primary current. 30-40% Above 40% 15-30% 3-5% 30-40% Above 40% 15-30% 3-5% ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following property is not necessarily desirable in the material for transformer core? Low hysteresis loss High permeability High thermal conductivity Mechanical strength Low hysteresis loss High permeability High thermal conductivity Mechanical strength 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 copper loss becomes high in proportion to the output voltage drop both in primary and secondary becomes large iron loss is increased considerably secondary output is much less as compared to primary input copper loss becomes high in proportion to the output voltage drop both in primary and secondary becomes large ANSWER DOWNLOAD EXAMIANS APP
Transformers The power efficiency of a lightning transformer is always ______its all day efficiency. Less than None of the listed here Equal to Higher than Less than None of the listed here Equal to Higher than ANSWER DOWNLOAD EXAMIANS APP
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