Transformers In an auto transformer, the primary and secondary are _____ coupled. Only magnetically Magnetically as well as electrically None of the listed here Only electrically Only magnetically Magnetically as well as electrically None of the listed here Only electrically ANSWER DOWNLOAD EXAMIANS APP
Transformers The no load ratio of a 50 Hz single phase transformer is 6000/250 V. The maximum flux in the core is 0.06 Wb. What is the number of primary turns? 450 210 900 350 450 210 900 350 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 0.85 V 0 V 1 V 1.7 V 0.85 V 0 V 1 V 1.7 V ANSWER DOWNLOAD EXAMIANS APP
Transformers In case of 3-phase induction motors, plugging means locking of rotor due to harmonics interchanging two supply phases for quick stopping starting the motor on load which is more than the rated load pulling the motor directly on line without a starter locking of rotor due to harmonics interchanging two supply phases for quick stopping starting the motor on load which is more than the rated load pulling the motor directly on line without a starter ANSWER DOWNLOAD EXAMIANS APP
Transformers Primary winding of a transformer None of these is always a high voltage winding is always a low voltage winding could either be a low voltage or high voltage winding None of these is always a high voltage winding is always a low voltage winding could either be a low voltage or high voltage winding 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 None of these 15 A more than 15 A less than 15 A None of these 15 A more than 15 A less than 15 A ANSWER DOWNLOAD EXAMIANS APP
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