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 ___________.

 5 %.
 1.5 %.
  2.67 %.
  30 %.

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Electrical Machines
Two dc machines A and B, using the same conductor material, have armature circuit resistances of 0.4 Ω and 1.2 Ω respectively. Of the two machines,

 A is bigger than B for the same current rating
 A is bigger than B for the same voltage rating
 B is bigger than A for the same current rating
 both are of the same size for the same current rating

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