Question

which device manages the flow of current in an electric circuit?
the wire
the switch
the battery
the light bulb

Explanation:

• The wire is used to conduct current, not manage its flow.
• A switch can open or close a circuit, thus controlling (managing) the flow of current.
• The battery provides the electrical energy (voltage) to drive the current, not manage its flow.
• The light bulb is a load that converts electrical energy to light/heat, not for managing current flow.

Answer:

the switch