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Three Phase Induction Motors

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

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

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Three Phase Induction Motors
If the supply voltage of a 3-phase induction motor is increased two times, then torque is _______

Increased four times
Decreased four times
Increased two times
Decreased two times

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

4%
Less than 1%
1.5 %
2%

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Three Phase Induction Motors
The full load slip of a 3-phase induction motor ranges from

None of the listed here
20 to 30 %
2 to 5 %
10 to 20 %

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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 _____

None of the listed here
50 Hz
25 Hz
60 Hz

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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

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

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