Three Phase Induction Motors The injected e.m.f. in the rotor of induction motor must have 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 Zero frequency ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The speed of a squirrel-cage induction motor can be controlled by all of the following except Changing supply frequency Reducing supply voltage Changing number of poles Changing winding resistance Changing supply frequency Reducing supply voltage Changing number of poles Changing winding resistance 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 Infinity Small Large Absent Infinity Small Large Absent ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The torque developed in the cage induction motor with auto-starter is 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 K2 × torque with direct switching k2/torque with direct switching ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The condition of induction motor on load resemble those of a transformer whose secondady is _______ None of the listed here Open circuited Supplying a variable resistive load Short circuited None of the listed here Open circuited Supplying a variable resistive load Short circuited ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors An induction motor is Self starting with low torque Self starting with zero torque Non self starting Self starting with high torque Self starting with low torque Self starting with zero torque Non self starting Self starting with high torque ANSWER DOWNLOAD EXAMIANS APP
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