A device used for converting A.C. into D.C. is called (a)transformer (b)rectifier (c)induction coil (d)dynamo
option B. A rectifier is an electrical tool that converts alternating current (AC), which periodically reverses course, to direct current (DC), which flows in best one path. The method is referred to as rectification, due to the fact that it "straightens" the route of current.
