In Circuit X, if one of the light bulbs is unscrewed or breaks, what will happen to the other light bulb?

Circuit X shows two light bulbs connected in series. In a series circuit, all components are connected along a single path.

If one component in a series circuit (like a light bulb) breaks or is unscrewed, it creates an open circuit. This stops the flow of electric current through the entire circuit.

Since the current stops flowing, the other light bulb will also go out.

Answer:
The other light bulb will go out (or stop glowing).