THREE PHASE INDUCTION MOTORS QUIZ

Low resistance

high resistance

Large slip

High reactance

The same phase as the rotor e.m.f.

Zero frequency

The same frequency as the slip frequency

High value for the satisfactory speed control

Open circuited

None of the listed here

Supplying a variable resistive load

Short circuited

No load current is decreased

Leakage reactances are increased

None of the listed here

Leakage reactances are decreased

Changing winding resistance

Changing number of poles

Reducing supply voltage

Changing supply frequency

Steady

None of the listed here

Rotating

Alternating

Any of the listed here

Stiff

Flexible

Hollow

Frequency

All of the listed here

Rotor inductive reactance

Square of supply voltage

Supply frequency

Phase sequence of supply voltage

Magnitude of supply voltage

Number of poles

2 cm to 4 cm

0.4 mm to 4 mm

4 cm to 6 cm

1 cm to 2 cm