Question

An AC generator can be converted into DC generator by replacing ................. .

Answer 1

An $AC$ generator can be converted into a $DC$ generator by replacing the slip rings of an $AC$ generator with the commutator of $DC$ generator,

Working; The only difference between $AC$ and $DC$ current is that in case of $AC$ the current Alternates the direction in the loop but in the case of $DC$ the current always flows in the same direction.

Generating slip ring is fixed with one side arm of the loop hence after ${180}^0$ turn of the loop the end becomes opposite polar than the previously charged. So the current flows in the opposite direction.

But in the case of the commutator which is just softly attached to the brushes they are exchanged with each other after every ${180}^0$ turn.So although one end changes it's terminal yet it gets attached with other brush. Hence net effect is cancelled out and current follows the original direction.