A. Its power factor goes on decreasing
B. Its power factor remains constant
C. Its power factor goes on increasing even after full load
D. Its power factor goes on increasing up to full load and then it falls again
Answer: Option D
This Question Belongs to Electrical Engineering >> Polyphase Induction Motors
Which is of the following data is required to draw the circle diagram for an induction motor?
A. Block rotor test only
B. No load test only
C. Block rotor test and no-load test
D. Block rotor test, no-load test and stator resistance test
The starting torque of a three phase induction motor can be increased by
A. Increasing slip
B. Increasing current
C. Both (A) and (B)
D. None of the above
Rotor rheostat control method of speed control is used for
A. Squirrel-cage induction motors only
B. Slip ring induction motors only
C. Both (A) and (B)
D. None of the above
As load goes on increasing in Induction motor it starts to draw more active current so its p.f increasing and after full load, it decreases again.