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Three Phase Induction Motors

Three Phase Induction Motors
When the rotor of a 3-phase induction motor is blocked, the slip is _____

1
0
0.5
0.1

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

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

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Three Phase Induction Motors
If an induction motor is running at slip S, then rotor output is ______

(1-S) × rotor input
(S-1) × rotor input
S × rotor input
(1+S) × rotor input

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Three Phase Induction Motors
The shape of the torque/slip curve of induction motor is

Parabola
Rectangular parabola
Hyperbola
Straight line

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

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

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Three Phase Induction Motors
The low power factor of induction motor is due to

Rotor leakage reactance
All of these
Stator reactance
The reactive lagging magnetizing current necessary to generate the magnetic flux

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