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Three Phase Induction Motors

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

Shaft
Stator core
Bearings
None of these

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

Mutual induction
Self induction
Hysteresis
Eddy currents

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Three Phase Induction Motors
If the rotor slots are made deeper, rotor resistance is ______

Decreased at starting
Increased under running conditions
Increased at starting
None of the listed here

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Three Phase Induction Motors
The maximum torque in an induction motor depends on

Rotor inductive reactance
All of the listed here
Frequency
Square of supply voltage

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Three Phase Induction Motors
The starting torque of a 3-phase induction motor is _______ supply voltage.

None of the listed here
Independent of
Directly proportional to sqaure of
Directly proportional to

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

Line voltage
Running torque
Slip
Rotor current

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