The torque developed by a 3-phase induction motor least depends on? Mark as favorite Copy Link rotor current rotor power factor rotor e.m.f. shaft diameter Check Answer
If s is the slip and f is the supply frequency, the frequency of rotor current is given by? Mark as favorite Copy Link s.f s2f s.f/2 f/s Check Answer
In an induction motor the relationship between stator slots and rotor slots is that? Mark as favorite Copy Link stator slots are equal to rotor slots stator slots are exact multiple of rotor slots stator slots are not exact multiple of rotor slots none of the above Check Answer
In medium sized induction motors, the slip is generally around? Mark as favorite Copy Link 0.04% 0.4% 4% 14% Check Answer
The torque developed by a 3-phase induction motor least depends on? Mark as favorite Copy Link rotor current rotor power factor rotor e.m.f. shaft diameter Check Answer
The power factor of an induction motor under no-load conditions is about? Mark as favorite Copy Link 0.2 lag 0.4 lag unity 0.4 lead Check Answer
In an induction motor, the rotor reactance per phase is proportional to? Mark as favorite Copy Link s 1/s 1/s2 s2 Check Answer
Which of the following methods is easily applicable to control the speed of the squirrel-cage induction motor? Mark as favorite Copy Link By changing the number of stator poles Rotor rheostat control By operating two motors in cascade By injecting e.m.f. in the rotor circuit Check Answer
In case the air gap in an induction motor is increased? Mark as favorite Copy Link the magnetising current of the rotor will decrease the power factor will decrease speed of motor will increase the windage losses will increase Check Answer
A 3-phase 440 V, 50 Hz induction motor has 4% slip. The frequency of rotor e.m.f. will be? Mark as favorite Copy Link 200 Hz 60 Hz 2 Hz 0.2 Hz Check Answer