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Electrical Machines

Electrical Machines
When maximum starting torque is obtained, rotor power is

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Electrical Machines
In case of DC Shunt Motor electromagnetic torque developed is

 None of above.
 Inversely proportional to the armature current.
 Proportional to the armature current.
 Proportional to the square of armature current.

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Electrical Machines
In a DC generator the actual flux distribution depends upon

  clearance between tips of the adjacent pole shoes.
  shape of the pole shoe.
  all of above.
 size of air gap.

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Electrical Machines
In a Dc generator the magnetic neutral axis coincide with geometrical neutral axis, when

  there is no load on the generator.
  the generator runs on overload.
  the generator runs on designed speed.
  the generator runs on full load.

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Electrical Machines
Which of the following is the largest conversion device?

 DC machine
All of these
 Induction machine
 Synchronous machine

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Electrical Machines
Which of the following represents the pitch factor?

 Cos α²
 Cos (α/2)
 Cos α
 sin (α/2)

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MORE MCQ ON Electrical Machines

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