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Three Phase Induction Motors

Three Phase Induction Motors
The full load slip of a 3-phase induction motor ranges from

None of the listed here
20 to 30 %
2 to 5 %
10 to 20 %

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Three Phase Induction Motors
The direction of rotation of field in a 3 phase induction motor depends upon _____

Number of poles
Phase sequence of supply voltage
Supply frequency
Magnitude of supply voltage

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Three Phase Induction Motors
The term cogging is associated with

Induction motors
Compound generators
Dc series motors
Three phase transformer

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Three Phase Induction Motors
In a squirrel cage induction motor, the number of rotor bars is generally ________

None of the listed here
Prime number
Even number
Equal to stator poles

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

Rotor power factor
Rotor emf
Shaft diameter
Rotor current

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Three Phase Induction Motors
The starting torque of a squirrel cage induction motor is

Same as full load torque
Slightly more than full load torque
Negligible
Low

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