Transformers Power transformers are generally designed to have maximum efficiency around 10% overload near full-load no-load half-load 10% overload near full-load no-load half-load ANSWER DOWNLOAD EXAMIANS APP
Transformers The permissible flux density in case of cold rolled grain oriented steel is around 3.7 Wb/m² 2.7 Wb/m² 1.7 Wb/m² 4.7 Wb/m² 3.7 Wb/m² 2.7 Wb/m² 1.7 Wb/m² 4.7 Wb/m² ANSWER DOWNLOAD EXAMIANS APP
Transformers Efficiency of a power transformer is of the order of 25 per cent 98 per cent 50 per cent 100 per cent 25 per cent 98 per cent 50 per cent 100 per cent ANSWER DOWNLOAD EXAMIANS APP
Transformers When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is 240 V 2,400 V 120 V 12 V 240 V 2,400 V 120 V 12 V ANSWER DOWNLOAD EXAMIANS APP
Transformers In case of 3-phase induction motors, plugging means locking of rotor due to harmonics pulling the motor directly on line without a starter starting the motor on load which is more than the rated load interchanging two supply phases for quick stopping locking of rotor due to harmonics pulling the motor directly on line without a starter starting the motor on load which is more than the rated load interchanging two supply phases for quick stopping ANSWER DOWNLOAD EXAMIANS APP
Transformers Which winding in a transformer has more number of turns? Primary winding Low voltage winding High voltage winding Secondary winding Primary winding Low voltage winding High voltage winding Secondary winding ANSWER DOWNLOAD EXAMIANS APP
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