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Three Phase Induction Motors

Three Phase Induction Motors
In the circle diagram for induction motor, the diameter of the circle represents

Running torque
Slip
Rotor current
Line voltage

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Three Phase Induction Motors
The rotor of an induction motor runs at

Below synchronous speed
Any of the above
Above synchronous speed
Synchronous speed

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Three Phase Induction Motors
In an induction motor, the ratio of rotor cu loss and rotor input is given by

1-S
S/1-S
1/S
S

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Three Phase Induction Motors
The starting torque of a squirrel cage induction motor is

Slightly more than full load torque
Low
Negligible
Same as full load torque

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

0.2 lagging
0.5 leading
0.2 leading
Unity

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Three Phase Induction Motors
Which of the following component is usually fabricated out of silicon steel?

None of these
Bearings
Stator core
Shaft

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