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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
If a 3-phase induction motor is running at slip S, then rotor copper loss is equal to

None of the listed here
S × rotor input
(1-S) × rotor input
(1+S) × rotor input

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

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

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

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

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

Slip
Line voltage
Running torque
Rotor current

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Three Phase Induction Motors
The complete circle diagram of induction motor can be drawn with the help of data found from

Stator resistance test
No-load test
All of these
Blocked rotor test

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