Transformers A no-load test is performed on a transformer to determine core loss copper loss magnetising current efficiency magnetising current and loss core loss copper loss magnetising current efficiency magnetising current and loss ANSWER DOWNLOAD EXAMIANS APP
Transformers In a transformer the energy is conveyed from primary to secondary through cooling coil through air None of these by the flux through cooling coil through air None of these by the flux ANSWER DOWNLOAD EXAMIANS APP
Transformers In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of less than 15 A more than 15 A 15 A None of these less than 15 A more than 15 A 15 A None of these ANSWER DOWNLOAD EXAMIANS APP
Transformers The permissible flux density in case of cold rolled grain oriented steel is around 4.7 Wb/m² 1.7 Wb/m² 3.7 Wb/m² 2.7 Wb/m² 4.7 Wb/m² 1.7 Wb/m² 3.7 Wb/m² 2.7 Wb/m² 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 1 V 0.85 V 0 V 1.7 V 1 V 0.85 V 0 V 1.7 V ANSWER DOWNLOAD EXAMIANS APP
Transformers Transformer having ratings less than 5kVA are generally ______ Water cooled Oil cooled Natural air cooled None of the listed here Water cooled Oil cooled Natural air cooled None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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