Transformers Which of the following property is not necessarily desirable in the material for transformer core? High thermal conductivity Mechanical strength High permeability Low hysteresis loss High thermal conductivity Mechanical strength High permeability Low hysteresis loss ANSWER DOWNLOAD EXAMIANS APP
Transformers What is the approximate efficiency of large transformers? 75% 95 % 65% 85% 75% 95 % 65% 85% ANSWER DOWNLOAD EXAMIANS APP
Transformers The path of the magnetic flux in transformer should have low reactance high reluctance low resistance high resistance low reactance high reluctance low resistance high resistance ANSWER DOWNLOAD EXAMIANS APP
Transformers Losses which occur in rotating electric machines and do not occur in trans formers are copper losses friction and windage losses hysteresis and eddy current losses magnetic losses copper losses friction and windage losses hysteresis and eddy current losses magnetic losses ANSWER DOWNLOAD EXAMIANS APP
Transformers Cores of large transformers are built upto nearly circular cross section in order to reduce Eddy current loss Copper loss Iron losses Leakage reactance Eddy current loss Copper loss Iron losses Leakage reactance ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer has full load copper loss of 400 W. The copper loss at half full load will be _____. 400 W 200 W 100 W None of the listed here 400 W 200 W 100 W None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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