Electrical Machines What is the frequency of rotor current of 50 Hz induction motor operating at 4% slip? 2.5Hz 2HZ 50Hz 1 Hz 2.5Hz 2HZ 50Hz 1 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC generator beyond critical resistance will generate maximum current. maximum power. no voltage. maximum voltage. maximum current. maximum power. no voltage. maximum voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a synchronous motor is running at synchronous speed, the damper winding produces no torque. both 1 and 2. eddy current torque. damping torqe. no torque. both 1 and 2. eddy current torque. damping torqe. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements regarding the magnetization characteristics of a dc generator : 1. It represents the variation of field flux with field current. 2. Variation of open-circuit terminal voltage with field current is independent of speed 3. It is non-linear from zero to rated field current 4. It helps to determine the critical field resistance at a given speed 5. It always starts from the origin Which of these statements are correct ? 3 and 5 1, 2 and 5 2, 3 and 4 1 and 4 3 and 5 1, 2 and 5 2, 3 and 4 1 and 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor has negative speed regulation? Series motor Differential compound motor Cumulative compound motors Shunt motor Series motor Differential compound motor Cumulative compound motors Shunt motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC generator will not build up voltage if field resistance is more than critical resistance. if it has lost residual magnetism. any one of above. due to wrong direction of rotation. if field resistance is more than critical resistance. if it has lost residual magnetism. any one of above. due to wrong direction of rotation. ANSWER DOWNLOAD EXAMIANS APP
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