If an emf at slip frequency is injected at an angle with existing ro – McqOptions

MCQOPTIONS

1.	If an emf at slip frequency is injected at an angle with existing rotor induced emf, then the ___________
A.	power factor only improves
B.	speed changes
C.	power factor improves and speed changes
D.	power factor worsens and speed changes
Answer» B. speed changes

Discussion

No Comment Found

Related MCQs

If an emf at slip frequency is injected at an angle with existing rotor induced emf, then the ___________
A constant torque variable power drive of induction machine has ___________
If a 3-phase induction motor is fed from the rotor short circuiting the stator terminals, frequency of the current flowing in the short-circuited stator is?
Torque-slip characteristic of an induction motor is linear in the smaller slip values, because ___________
For 3-phase induction motor, as load increases from no load towards the full load then the ___________
Due to the line to ground fault, phase a in the induction motor phase supply gets cut, then machine ___________
If one of the supply fuses blows off and gets open circuited, then for the connected induction machine continues to run with increased slip.
Choose from the below which can be obtained by the equivalent circuit of an electrical machine?
A center ammeter connected to the rotor end circuit of a 6-pole,50 Hz, induction motor makes 45 complete oscillations in a minute. Then the rotor speed and the speed of stator field w.r.t. rotor is?
A 3-phase slip ring IM is has its copper bars changed by the aluminium bars in the machine. With the above change ___________