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Electrical Machines

Electrical Machines
For a dc machine shunt resistance and armature resistance values are

 low and high
 high and low
 high and high
 low and low

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Electrical Machines
In synchronous motor the torque is proportional to

 P²
 1/P²
 Power P
 1/P

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Electrical Machines
In a 3 - Φ wound rotor induction motor the short circuit gear is used to short circuit the

  stator phases of the motor.
None of these
  rotor at slip rings.
  starting resistance in the starter.

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Electrical Machines
A shaded pole single phase induction motor can be used for

 tape recorders
 personal computers as cooling fan
 wet grinders
 food mixers

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Electrical Machines
Hunting in a synchronous motor takes place

  motor is under loaded.
  when power factor is unity.
  when supply voltage fluctuates.
  when load varies.

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

  Burn.
 Run at lower speed.
 Not run.
 Run at normal speed.

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MORE MCQ ON Electrical Machines

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