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Electrical Machines

Electrical Machines
In salient pole synchronous machine, the reluctance power varies as

 sinδ
 cosδ
 sin2δ
 cos2δ

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Electrical Machines
A DC motor with armature resistance of 0.5 ohms is connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is

 250 A.
 460 A.
 340 A.
 570 A.

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Electrical Machines
In above question, the output power delivered by generator G1 and G2 will be

 5.7 kW, 8.7 kW.
 9.6 kW, 12 kW.
 9.3 kW, 9.3 kW.
  6.3 kW, 9.3 kW.

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Electrical Machines
In DC generator, brushes are always placed along

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

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Electrical Machines
Which of the following motors are suitable for computer printer drive ?

 Hysteresis motor.
 Reluctance motor.
  Stepper motor.
 Shaded pole motor.

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Electrical Machines
Damper winding is used to

 decrease the load current.
 suppress the hunting.
 increase the load current.
 both 1 and 2.

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MORE MCQ ON Electrical Machines

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