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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 _____

0.5
1
0
0.1

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Three Phase Induction Motors
The shaft of induction motor is made of

Hollow
Flexible
Any of the listed here
Stiff

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

Eddy currents
Self induction
Mutual induction
Hysteresis

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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 exact multiple of rotor slots
Stator slots are equal to rotor slots
Stator slots are not exact multiple of rotor slots

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Three Phase Induction Motors
Size of a high speed motor as compared to low speed motor for the same HP will be

Bigger
Same
Smaller
Any 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

Absent
Small
Infinity
Large

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