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Three Phase Induction Motors

Three Phase Induction Motors
The induction motor has lagging power factor during

Both starting and operation
Operation only
Starting only
None of the listed here

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

Mutual induction
Eddy currents
Self induction
Hysteresis

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Three Phase Induction Motors
When a 3-phase induction motor is at no load, the slip is ______

1
0.2
0.5
Practically zero

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

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

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Three Phase Induction Motors
In induction motor, percentage slip depends on

Copper losses in motor
None of these
Supply voltage
Supply frequency

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Three Phase Induction Motors
The 3- phase induction motor is so designed that the rotor should have ______ under running conditions.

Low resistance
high resistance
Large slip
High reactance

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