Transformers Which of the following property is not necessarily desirable in the material for transformer core? Mechanical strength High permeability High thermal conductivity Low hysteresis loss Mechanical strength High permeability High thermal conductivity Low hysteresis loss ANSWER DOWNLOAD EXAMIANS APP
Transformers A step up transformer increases Current Power Voltage Frequency Current Power Voltage Frequency ANSWER DOWNLOAD EXAMIANS APP
Transformers The permissible flux density in case of cold rolled grain oriented steel is around 1.7 Wb/m² 2.7 Wb/m² 3.7 Wb/m² 4.7 Wb/m² 1.7 Wb/m² 2.7 Wb/m² 3.7 Wb/m² 4.7 Wb/m² ANSWER DOWNLOAD EXAMIANS APP
Transformers In which of the following transformer part of primary winding also serves as the secondary winding? Auto transformer Step-up transformer Potential transformer Current transformer Auto transformer Step-up transformer Potential transformer Current transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers The no load primary current is about ______of full load primary current. Above 40% 30-40% 15-30% 3-5% Above 40% 30-40% 15-30% 3-5% ANSWER DOWNLOAD EXAMIANS APP
Transformers What is the approximate efficiency of large transformers? 75% 85% 65% 95 % 75% 85% 65% 95 % ANSWER DOWNLOAD EXAMIANS APP
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