Question

if a switch is open in a series circuit with a battery trying to light a bulb, what will happen?
the bulb will light up.
the switch is not working.
the bulb will not light up.

Explanation:

A series circuit requires a closed, continuous path for electric current to flow from the battery, through the components, and back. An open switch breaks this continuous path, so no current can travel to the bulb.

Answer:

The bulb will not light up.