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Electrical Machines

Electrical Machines
From no load to full load the slip will

None of these
 slightly increase.
 slightly decrease.
 not change.

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Electrical Machines
A 220 V dc machine has an armature resistance of 1Ω.If the full-load current is 20 A, the differenc in the induced voltages when the machine is running as a motor and as a generator is

 40 V
 zero
 20 V
 50 V

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Electrical Machines
Which of the following relation is correct?

 Xd = Xq.
 Xd > Xq.
 Xd < Xq.
None of these

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Electrical Machines
In applied voltage is reduced in a dc shunt motor

 Full load speed.
  Full load current.
 Full load torque.
 None of these.

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Electrical Machines
Alternator operates on the principle of

  electromagnetic induction.
  self or mutual induction.
  mutual induction.
  self induction.

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Electrical Machines
Belt conveyors offer _______________ starting torque.

  high.
  medium.
  zero.
  low.

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MORE MCQ ON Electrical Machines

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