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Three Phase Induction Motors

Three Phase Induction Motors
In medium sized induction motor, the slip is generally around

14%
4 %
0.4 %
0.04 %

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Three Phase Induction Motors
The frequency of rotor current in a 6-pole , 50 Hz, 3-phase induction motor running at 950 rpm is

0.05 Hz
1.5 Hz
2.5 Hz
5 Hz

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

Large
Small
None of the listed here
Practically zero

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Three Phase Induction Motors
If the air gap between the rotor and stator of a 3-phase induction motor is increased, then_______

No load current is decreased
Leakage reactances are decreased
Leakage reactances are increased
None of the listed here

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Three Phase Induction Motors
The torque developed in the cage induction motor with auto-starter is

k2/torque with direct switching
K × torque with direct switching
K2 × torque with direct switching
k/torque with direct switching

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

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

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MORE MCQ ON Three Phase Induction Motors

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