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Three Phase Induction Motors
5 H.P., 50Hz, 3-phase, 440 V, induction motors are available for the following r.p.m. Which motor will be the costliest?
1440 rpm
2880 rpm
730 rpm
1000 rpm
1440 rpm
2880 rpm
730 rpm
1000 rpm
Answer
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Related Question
Three Phase Induction Motors
The condition of induction motor at no load resemble those of a transformer whose secondady is _______
None of the listed here
Supplying a variable resistive load
Short-circuited
Open circuited
None of the listed here
Supplying a variable resistive load
Short-circuited
Open circuited
Answer
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Three Phase Induction Motors
In the circle diagram for induction motor, the diameter of the circle represents
Rotor current
Slip
Line voltage
Running torque
Rotor current
Slip
Line voltage
Running torque
Answer
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Three Phase Induction Motors
The torque developed by a 3 phase induction motor least depends on
Rotor current
Rotor power factor
Rotor emf
Shaft diameter
Rotor current
Rotor power factor
Rotor emf
Shaft diameter
Answer
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Three Phase Induction Motors
In a 3 phase induction motor, the rotor speed is _____ the synchronous speed.
None of the listed here
Greater than
Smaller than
Equal to
None of the listed here
Greater than
Smaller than
Equal to
Answer
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Three Phase Induction Motors
A 3 phase 440 v, 50 Hz induction motor has 4% slip. The frequency of rotor emf will be
20 Hz
50 Hz
2 Hz
200 Hz
20 Hz
50 Hz
2 Hz
200 Hz
Answer
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