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Three Phase Induction Motors

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

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

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Three Phase Induction Motors
In a 3 phase induction motor, the rotor speed is _____ the synchronous speed.

None of the listed here
Smaller than
Equal to
Greater than

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Three Phase Induction Motors
The induction motor has lagging power factor during

Starting only
Operation only
Both starting and operation
None of the listed here

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Three Phase Induction Motors
A four speed squirrel cage induction motor uses______ stator windings.

Four
Two
One
Three

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Three Phase Induction Motors
The good power factor of an induction motor can be achieved if the average flux density in the air gap is

Absent
Large
Infinity
Small

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Three Phase Induction Motors
The shape of the torque/slip curve of induction motor is

Rectangular parabola
Parabola
Straight line
Hyperbola

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