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Three Phase Induction Motors

Three Phase Induction Motors
Size of a high speed motor as compared to low speed motor for the same HP will be

Any of the listed here
Bigger
Same
Smaller

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

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

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Three Phase Induction Motors
The torque developed by a 3 phase induction motor least depends on

Shaft diameter
Rotor power factor
Rotor current
Rotor emf

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Three Phase Induction Motors
The power factor of an induction motor under no load conditions will be closer to

0.2 leading
Unity
0.2 lagging
0.5 leading

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Three Phase Induction Motors
The starting torque of an induction motor is maximum when rotor resistance per phase is _____ rotor reactance / phase.

Four times
Equal to
Two times
None of the listed here

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

Rotor current
Running torque
Line voltage
Slip

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