Electrical Machines
A three phase induction motor has a synchronous speed of 1500 rpm the machine runs at 1460 rpm at a particular load. The slip at this load is ___________.

 1.5 %.
  2.67 %.
  30 %.
 5 %.

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Electrical Machines
In dc machines, the field system has to be provided on stator unlike synchronous machines Where in it could be on any member, because

 dc machines are comparatively low rating machines.
 it gives more uniform air-gap flux distribution
 commutator action is not possible otherwise
 it reduces field structure iron losses

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