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Three Phase Induction Motors

Three Phase Induction Motors
The stator of a three phase induction motor produces _______ magnetic field.

Alternating
None of the listed here
Steady
Rotating

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Three Phase Induction Motors
If a 4 pole induction motor has a synchronous speed of 1500 rpm, then supply frequency is _____

60 Hz
50 Hz
25 Hz
None of the listed here

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Three Phase Induction Motors
The number of slip rings on a squirrel cage induction motor is usually

Two
One
Three
None

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Three Phase Induction Motors
Reduced voltage starter can be used with

Squirrel cage as well as slip ring induction motor
None of these
Slip ring motor only but not with squirrel cage induction motor
Squirrel cage induction motor only but not with slip ring motor

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Three Phase Induction Motors
The synchronous speed of a 3-phase induction motor having 20 poles and connected to a 50 Hz source is _____

600 rpm
1200 rpm
1000 rpm
300 rpm

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

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