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Three Phase Induction Motors

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

14%
0.04 %
0.4 %
4 %

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Three Phase Induction Motors
In an induction motor, no load the slip is generally

2%
1.5 %
4%
Less than 1%

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Three Phase Induction Motors
The maximum torque of a 3-phase induction motor under running conditions is

None of the listed here
Directly proportional to rotor resistance
Inveresly proportional to supply voltage
inversely proportional to rotor reactance at standstill

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Three Phase Induction Motors
In a squirrel cage induction motor, the number of stator slots is _______ rotor slots.

Always greater than the number of
Either more or less than the number of
Always eqaul to the number of
Always less than the number of

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Three Phase Induction Motors
The synchronous speed of a 3-phase induction motor having 20 poles and connected to a 50 Hz source is _____

1000 rpm
600 rpm
300 rpm
1200 rpm

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

Copper losses in motor
Supply frequency
None of these
Supply voltage

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