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Electrical Machines

Electrical Machines
If we increase the rotor reactance value, the maximum torque will

None of these
 not changed
 increase
 decrease

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Electrical Machines
No load saturation characteristics are plotted between

 short circuit current and armature current
 short circuit current and field current
 no load voltage and armature current
 no load voltage and field current

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Electrical Machines
Maximum power developed depends on

 reactance
 voltage
 both 1and 2
 load angle

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Electrical Machines
For high current and low voltage rating which winding is employed to DC machine?

 Both wave and lap winding.
 Lap winding.
 No wave and lap winding.
 Wave winding.

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Electrical Machines
An induction motor has a rotor resistance of 0.002 Ω / phase. If the resistance is increased to 0.004 Ω / phase then the maximum torque will

 increase by 200%
 reduced to half
 increase by 100%
 remain unaltered

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Electrical Machines
A DC generator can be considered as

 power pump.
 rectifier.
 prime mover.
 rotating amplifier.

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MORE MCQ ON Electrical Machines

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