Electrical Machines
Which of the following rotor requires damper winding?

None of these
 Salient pole rotor.
 Cylindrical rotor.
 Both type rotor.

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Electrical Machines
In a loaded DC generator, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will

 improve with fall of terminal voltage.
 deteriorate with fall of terminal voltage.
 deteriorate with rise in terminal voltage.
 improve with rise in terminal voltage.

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