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Electrical Machines

Electrical Machines
Eb/V ratio of a DC motor is an indication of

 Starting torque.
 Running Torque.
 Speed regulation.
  Effiency.

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Electrical Machines
Larger values of air flux density is taken while designing IM for

  larger bore diameter.
  both.
  none.
  larger output.

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Electrical Machines
The rotor winding for a 3-phase slip-ring induction motor having delta-connected stator must be connected in

  star.
  delta or star according to need.
None of these
  delta.

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Electrical Machines
A 3 phase stepper motor has 6 stator poles and 4 rotor poles, then find the step angle?

 45°
 10°
 60°
 30°

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Electrical Machines
Under which of the following conditions hunting of synchronous motor is likely to occur ?

  Periodic variation of load.
  Small and constant load.
  Over-excitation.
  Over-loading for long period.

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Electrical Machines
In DC motors, under trailing pole tips, flux density will_______ ?

 increase
 decrease
 either increase or decrease
None of these

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MORE MCQ ON Electrical Machines

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