Electrical Machines
A dc motor with armature resistance of 0.5 ohms connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is

 570 A.
  340 A.
 250 A.
  460 A.

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

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