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Electrical Machines

Electrical Machines
A DC generator without commutator is a

 DC generator
 induction motor
 AC generator
 DC motor

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Electrical Machines
The condition for maximum running torque is

 zero
 0.5 lagging
 0.707 lagging
 R = S.X
 unity

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Electrical Machines
The rotor electromotive force of the IM is observed to make 100 complete alterations per minute, calculated slip

None of these
  3.33 %.
 3 %.
 0 .001 %.

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Electrical Machines
On what factors the speed of dc motor depends?

 Field flux.
 Applied voltage.
 All of these.
 Armature current Ia.

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Electrical Machines
A DC 4 pole lap wound generator is running at 1000 rpm having 1200 conductors and flux density is 10 mwb. find the generated emf?

 10V
 200V
 20V
 100V

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Electrical Machines
Stepper motor is used in

All of these
 food processing
 traction
 computer printers

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MORE MCQ ON Electrical Machines

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