THREE PHASE INDUCTION MOTORS QUIZ

Large

Absent

Small

Infinity

Both supply frequency and number of poles

The number of its poles

The maximum flux/poles

The supply frequency

Greater than

Smaller than

None of the listed here

Equal to

Lower winding is more effective

None of the listed here

Outer cage winding has good pf

Lower cage winding has low reactance

k2/torque with direct switching

K2 × torque with direct switching

k/torque with direct switching

K × torque with direct switching

Rotor speed is more than the synchronous speed of the field and are in the same direction

Rotor speed is less than the synchronous speed of the field and are in the same direction

None of these

Magnetic field and rotor rotate in opposite direction

4 %

0.04 %

14%

0.4 %

None of the listed here

Decreased at starting

Increased at starting

Increased under running conditions

Greater mechanical strength

None of the listed here

Less rotor losses

Uniform torque

Operation only

Both starting and operation

Starting only

None of the listed here