Which is of the following data is required to draw the circle diagram for an induction motor ?

A. supply frequency
B. supply voltage
C. copper losses in motor
D. none of the above

A. magnetic field and rotor rotate in opposite direction
B. rotor speed is less than the synchronous speed of the field and are in the same direction
C. rotor speed is more than the synchronous speed of the field and are in the same direction
D. none of the above

A. 730 r.p.m.
B. 960 r.p.m.
C. 1440 r.p.m.
D. 2880 r.p.m.

A. Ball bearings
B. Cast iron bearings
C. Bush bearings
D. None of the above

A. twice the full load torque
B. 1.5 times the full load torque
C. equal to full load torque

A. the power factor will be low
B. windage losses will be more
C. bearing friction will reduce
D. copper loss will reduce In an induction motor