THREE PHASE INDUCTION MOTORS QUIZ

90%

65%

None of the listed here

40%

k2/torque with direct switching

K2 × torque with direct switching

K × torque with direct switching

k/torque with direct switching

2400 rpm

400 rpm

1600 rpm

1200 rpm

Open circuited

Short circuited

Supplying a variable resistive load

None of the listed here

S

1-S

1/S

S/1-S

2 poles

4 poles

6 poles

8 poles

Maximum at no load

Minimum at no load

None of the listed here

Remains the same at all loads

Rotor current becomes zero

Rotor current remains same

Decreases the rotor current

Increases the rotor current

60 to 90%

80 to 90%

95 to 98 %

99%

Rotor emf

Shaft diameter

Rotor current

Rotor power factor