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Three Phase Induction Motors

Three Phase Induction Motors
An induction motor is so called because its operation depends on

Hysteresis
Mutual induction
Eddy currents
Self induction

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Three Phase Induction Motors
In an induction motor the relationship between stator slots and rotor slots is that

None of the listed here
Stator slots are equal to rotor slots
Stator slots are not exact multiple of rotor slots
Stator slots are exact multiple of rotor slots

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Three Phase Induction Motors
In an induction motor, no load the slip is generally

Less than 1%
1.5 %
4%
2%

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Three Phase Induction Motors
The rotor of induction motor

Insufficient data
Always revolves in the direction of stator flux
Always revolves in the direction opposite to stator flux
None of the listed here

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Three Phase Induction Motors
In induction motor, percentage slip depends on

Supply voltage
Supply frequency
Copper losses in motor
None of these

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Three Phase Induction Motors
A 3 phase 440 v, 50 Hz induction motor has 4% slip. The frequency of rotor emf will be

200 Hz
50 Hz
2 Hz
20 Hz

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MORE MCQ ON Three Phase Induction Motors

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