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
 B is bigger than A for the same current rating
 A is bigger than B for the same current rating

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines