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Three Phase Induction Motors

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

Rotor current
Slip
Running torque
Line voltage

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Three Phase Induction Motors
For the same kVA rating, the leakage flux in induction motor is _______ that of transformer.

None of the listed here
More than
Less than
About the same

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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 a 3 phase induction motor, the rotor speed is _____ the synchronous speed.

Smaller than
Greater than
None of the listed here
Equal to

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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

Large
Small
Infinity
Absent

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Three Phase Induction Motors
The torque developed in the cage induction motor with auto-starter is

k/torque with direct switching
K2 × torque with direct switching
K × torque with direct switching
k2/torque with direct switching

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