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Three Phase Induction Motors

Three Phase Induction Motors
The term cogging is associated with

Induction motors
Three phase transformer
Dc series motors
Compound generators

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

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

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Three Phase Induction Motors
The starting torque of an induction motor is maximum when rotor resistance per phase is _____ rotor reactance / phase.

Equal to
None of the listed here
Four times
Two times

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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
Blocked rotor test
All of these
No-load test

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Three Phase Induction Motors
At no load the rotor core loss of a 3 phase induction motor is

None of the listed here
Practically zero
Small
Large

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Three Phase Induction Motors
The power factor of an induction motor under no load conditions will be closer to

0.5 leading
0.2 lagging
0.2 leading
Unity

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