Question

which reverses the flow of current through an electric motor?
brush
battery
armature
commutator

Explanation:

To determine which component reverses the current flow in an electric motor, we analyze each option:

• A brush in an electric motor is used to transfer current to the armature, not reverse it.
• A battery provides the electric current, it does not reverse the flow.
• An armature is the rotating part of the motor that carries the current and interacts with the magnetic field, but it does not reverse the current flow.
• A commutator is a device in an electric motor that reverses the direction of the current in the armature windings. This reversal ensures that the torque on the armature is always in the same direction, allowing continuous rotation.

Answer:

D. commutator