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Three Phase Induction Motors

Three Phase Induction Motors
The maximum torque in an induction motor depends on

Square of supply voltage
Rotor inductive reactance
All of the listed here
Frequency

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Three Phase Induction Motors
Insertion of resistance in the rotor of an induction motor to develop a given torque

Rotor current becomes zero
Decreases the rotor current
Rotor current remains same
Increases the rotor current

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Three Phase Induction Motors
In a squirrel cage rotor, the bars are not placed parallel to the shaft but are skewed to have ______

None of the listed here
Less rotor losses
Uniform torque
Greater mechanical strength

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Three Phase Induction Motors
In the circle diagram for induction motor, the diameter of the circle represents

Running torque
Rotor current
Slip
Line voltage

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Three Phase Induction Motors
In medium sized induction motor, the slip is generally around

0.04 %
0.4 %
4 %
14%

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Three Phase Induction Motors
For higher efficiency of 3-phase induction motor, the slip should be

Very large
Large
1
As small as possible

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MORE MCQ ON Three Phase Induction Motors

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