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Electrical Machines

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

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

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Electrical Machines
In DC machines internal characteristics are plotted between

 Vt vs load current
 Eg vs load current
 Eg vs Ia
 Vt vs Ia

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Electrical Machines
Slot wedges in a dc machine is made up of

 fibre.
 silicon steel.
 cast iron.
 mild steel.

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Electrical Machines
The slot edges in a DC machine are made of

  Fibre.
 Mild steel.
 Silicon steel.
 Cast iron.

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

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

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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

 0.01 Ω.
  0.54 Ω.
 0.06 Ω.
 0.54 Ω.

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MORE MCQ ON Electrical Machines

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