Three Phase Induction Motors The torque developed in the cage induction motor with auto-starter is k2/torque with direct switching K2 × torque with direct switching k/torque with direct switching K × torque with direct switching k2/torque with direct switching K2 × torque with direct switching k/torque with direct switching K × torque with direct switching ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The speed of a squirrel cage induction motor is changed by Pole changing Rheostatic control None of the listed here Cascade control Pole changing Rheostatic control None of the listed here Cascade control ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The magnetising current drawn by a 3 phase induction motor is about _______ of full load stator current. 30 to 50% 5% 15 to 20 % 10 to 15% 30 to 50% 5% 15 to 20 % 10 to 15% ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In a 3 phase induction motor, the rotor speed is _____ the synchronous speed. Equal to None of the listed here Greater than Smaller than Equal to None of the listed here Greater than Smaller than ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The injected e.m.f. in the rotor of induction motor must have Zero frequency High value for the satisfactory speed control The same phase as the rotor e.m.f. The same frequency as the slip frequency Zero frequency High value for the satisfactory speed control The same phase as the rotor e.m.f. The same frequency as the slip frequency ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The good power factor of an induction motor can be achieved if the average flux density in the air gap is Large Absent Infinity Small Large Absent Infinity Small ANSWER DOWNLOAD EXAMIANS APP
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