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Electrical Machines

Electrical Machines
The flux involved in the emf equation of a transformer has

  maximum value.
 average value.
 rms value.
 total value.

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Electrical Machines
A 8-pole, DC generator has a simplex wave-wound armature containing 32 coils of 6 turns each. Its flux per pole is 0.06 Wb. The machine is running at 250 rpm. The induced armature voltage is

 96 V
 192 V
 384 V
 768 V

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Electrical Machines
For a fault at the terminal of a synchronous generator, the fault current is maximum for a

 3 - phase to ground fault.
 line to line fault.
  line to ground fault.
 3 - phase fault.

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Electrical Machines
Capacitor in split phase induction motor is used to

 improve the power factor.
 start the motor.
 improve the starting torque.
 reduce the harmonics.

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Electrical Machines
In DC generators, electric current to the external circuit from armature is given through

 none of above.
 commutator.
 solid connection.
 slip rings.

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Electrical Machines
In a DC Shunt Motor if the load current increases keeping the terminal voltage constant, then flux will

 increase.
 remain constant.
 any of the above.
 decrease.

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