What type of device is used to ensure a steady current flow in a DC motor?

A commutator is a crucial component in a DC motor, as it plays a vital role in ensuring a steady current flow. The primary function of the commutator is to reverse the direction of current in the motor windings as the motor rotates. This switching mechanism allows the motor to maintain a continuous rotation in the same direction, which is essential for optimal operation.

In a DC motor, the coils of wire are energized by the direct current, and as the armature rotates, the commutator periodically switches the current direction in the coils. This action prevents the motor from getting stuck in one position and ensures that the torque generated remains consistent throughout the rotation. By ensuring the steady flow of current and reversing it at the right times, the commutator enables smooth and efficient motor performance.

Understanding the role of the commutator in relation to the other options is important. Diodes, for example, control current flow in a unidirectional manner but are not designed for the repeated switching required in a motor. Capacitors may be used in circuits for filtering or energy storage but do not control current direction in a DC motor. Resistors can limit current flow but do not contribute to maintaining the continuous rotation necessary in a motor's operation. The