Size of a high speed motor as compared to low speed motor for the same H.P. will be
A. Bigger
B. Smaller
C. Same
D. Any of the above
Answer: Option B
This Question Belongs to Electrical Engineering >> Polyphase Induction Motors
Join The Discussion
Comments (1)
Related Questions on 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
H.P= speed x torque
Since, Hp is same so torque will be less for small motor. So, less amount of mass will be required to deliver the same torque. Moreover, bigger magnet + thick wire + higher current = more torque.
Torque= force × radius
Less torque means less diameter
I hope now it's clear to all.