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Electrical Machines

Electrical Machines
Hysteresis loss will depends on

 f1.6
 f³
 f²
 f

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Electrical Machines
If a DC Series motor is connected across an AC supply it will

 run at normal speed.
 burn.
 run at lower speed.
 not run.

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Electrical Machines
Number of tappings for each equalizer ring is equal to

  number of pole pairs.
  number of poles.
  number of commutator segments.
  number of parallel paths.

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Electrical Machines
For very sensitive and wide speed control, the preferable control method is

 Multiple voltage control.
 Ward-Leonard control.
 Field control.
 Armature control.

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Electrical Machines
In an induction motor, the no-load slip is generally equal to

 4 %.
  zero.
  less than 1 %.
 1.5 %.

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Electrical Machines
A 6 pole lap connected DC generator with 480 conductors has armature resistance of 0.06 Ω. If the conductors are reconnected to from a wave winding other things remaining unchanged, the value of armature resistance will be

  0.54 Ω.
 0.01 Ω.
 0.06 Ω.
 0.54 Ω.

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MORE MCQ ON Electrical Machines

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