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Electrical Machines

Electrical Machines
Slip exists in

  synchronous motor.
  induction motor.
  none of above.
  in both machines.

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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
Which of the following windings are necessary in case of all dc machines?

 open type winding
 lap winding
 wave winding
 closed winding

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Electrical Machines
For the above problem, find the induced voltage of an alternator of it is to deliver a load of 100 A at power factor of 0.8 lagging with terminal voltage of 200 V.

  222 V.
 225 V.
 220 V.
 230 V.

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Electrical Machines
For a DC Shunt Motor having armature resistance of 0.5 Ω and 2 A armature current at no-load, when the armature current is changed to 20 A at loaded condition the speed is 1000 r.p.m. What is the speed at no-load?

 none of above.
 4575.4 r.p.m.
 1037.5 r.p.m.
 1130 r.p.m.

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Electrical Machines
Open circuit test on transformer gives

 both 1and 2
 eddy current loss
 copper loss
 hysteresis loss

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