In case the air gap in an induction motor is increased
A. The magnetizing current of the rotor will decrease
B. The power factor will decrease
C. Speed of motor will increase
D. The windage losses will increase
Answer: Option B
This Question Belongs to Electrical Engineering >> Polyphase Induction Motors
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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
How will the power factor will be affected if the air gap is increased in induction motor??