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Three Phase Induction Motors

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

Shaft diameter
Rotor emf
Rotor power factor
Rotor current

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Three Phase Induction Motors
The condition of induction motor at stand still resemble those of a transformer whose secondady is _______

Open circuited
Supplying a variable resistive load
Short circuited
None of the listed here

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Three Phase Induction Motors
A 3 phase induction motor is running at 2% slip. If the input to rotor is 1000 W, then mechanical power developed by the motor is _______

500 W
200 W
20 W
980 W

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

Unity
0.2 lagging
0.2 leading
0.5 leading

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

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

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Three Phase Induction Motors
In a double squirrel cage induction motor, the outer cage winding has _______

High resistance
Low resistance
High inductance
None of the listed here

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