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Electrical Machines

Electrical Machines
Eb/V ratio of a DC motor is an indication of

 Running Torque.
  Effiency.
 Starting torque.
 Speed regulation.

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Electrical Machines
In auto transformer if the turn ratio is K, what is the power transferred inductively?

 (1-K) × input power
 both A and B
None of these
 K × input power

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Electrical Machines
Which of the following motors has negative speed regulation?

 Both B and C.
 Shunt motors.
 Differential compound motors.
 Series motors.

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Electrical Machines
Induction motors have the advantage of

  less maintenance.
  all of below.
  less cost.
  simple in construction.

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Electrical Machines
CRGO steel is used in the core of transformer to reduce

  hysteresis loss.
 both eddy current and hysteresis loss.
 ohmic loss.
 eddy current loss.

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Electrical Machines
In DC generator, brushes are always placed along

 load axis.
 armature axis.
 geometrical neutral axis.
  magnetic neutral axis.

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MORE MCQ ON Electrical Machines

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