Electrical Machines
During no load test, an induction motor draws power

  only for the small copper loss.
  for core loss and copper loss.
  for copper loss and windage friction loss.
  for core loss and windage and friction loss.

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Electrical Machines
In a DC shunt generator working on load, the brushes are moved forward in the direction of rotation, as a result of this, commutation will

 improve but terminal voltage will fall.
  worsen and terminal voltage will rise.
  improve and terminal voltage will rise .
  worsen and terminal voltage will fall

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Electrical Machines
In a step down transformer which one of the following statements is true?

  Number of secondary turns is less than primary turns.
 Secondary power is less than primary power.
 Number of secondary turns is more than that of primary.
 Secondary current is less than primary current.

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