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Three Phase Induction Motors

Three Phase Induction Motors
Less maintenance troubles are experienced in case of

Slip ring induction motor
Both (A) and (B)
Squirrel cage induction motor
None of these

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

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Three Phase Induction Motors
Less maintenance troubles are experienced in terms of

Slip ring induction motor
None of the listed here
Both squirrel cage and slip ring
Squirrel cage induction motor

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Three Phase Induction Motors
The starting torque of a 3-phase induction motor is _______ supply voltage.

None of the listed here
Directly proportional to sqaure of
Directly proportional to
Independent of

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

Greater than
Equal to
Smaller than
None of the listed here

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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

Small
Absent
Large
Infinity

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