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Electrical Machines

Electrical Machines
In a lap winding dc machine number of conductors are 100 and number of parallel paths are 10. Find the average pitch

 50
 1
 100
 10

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Electrical Machines
In case of a dc motor the ratio Eb / E is indicative of

  ratio of starting to running torque.
  ratio of starting to running current.
  ratio of input to output voltage.
  efficiency.

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Electrical Machines
Lamination of transformer core is made of

 wrought iron.
 cast steel.
  cast iron.
  silicon steel.

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Electrical Machines
Capacitor fitted with ceiling / table fans is of the value of

 5 - 10 F.
  1 - 2 µF.
 0.1 µF.
  2 - 3 µF.

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Electrical Machines
For standing a DC motor a starter is required because

  It starts the motor.
  it limits the starting current to a safe value.
None of these
  it limits the speed of the motor.

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Electrical Machines
What will be the maximum power factor of an induction motor for dispersion coefficient of 0.05?

  0.05.
  0.905.
 1.1.
 20.

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