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Electrical Machines

Electrical Machines
Capacitor fitted with ceiling / table fans is of the value of

 0.1 µF.
  2 - 3 µF.
  1 - 2 µF.
 5 - 10 F.

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Electrical Machines
In a DC generator in case the brushes are moved so as to bring them in magnetic neutral axis, then, there will be

  none of above.
  cross-magnetization as well as demagnetization.
  cross-magnetisation.
 demagnetisation.

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Electrical Machines
If Ke is eddy current constant, Kf is form factor, f is supply frequency, Bm maximum flux density in core of transformer, the expression of eddy current loss in transformer, is given by

 KefKf2Bm2.
 Kef2KfBm2.
 Kef2Kf2Bm.
  Kef2Kf2Bm2.

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Electrical Machines
The armature shaft must be able to with stand

All of these
 Twisting stains due to transmission of torque.
 Any unbalanced magnetic pull on the armature core.
 Bending moment due to weight of the armature.

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Electrical Machines
The output indicate on the name plate of any motor is always the

 Power drawn in KW.
 Power drawn in KVA.
  Output power at the shaft.
 Gross power.

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Electrical Machines
The primary and secondary windings of a transformer are

  inductively linked.
 electrically linked.
 mechanically linked.
  conductively linked.

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