Electrical Machines
A dc shunt generator has full-load voltage regulation of 10% at rated speed of 1000 rpm. If it is now driven at 1250 rpm, then its voltage regulation at full load would

 be less than 10%
 be more than 10%
 remain unchanged
 be 12.5%

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Electrical Machines
The damper windings also called the squirrel cage windings or damper grids

  consists of short-circuited copper bars embedded in the field pole faces.
  both (A) and (B).
  are provided in a synchronous motor to make it self starting.
  are provided on the stator for improving power factor.

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