Question

4. A student connects a light bulb directly to an electric cell

using connecting wires. She notices that the light bulb
lights up. Is anything missing? Why would you consider
the missing part necessary?

Answer 1

Yes, something is missing in this setup. A switch is missing.

• A switch is necessary to turn the light on and off, and to control the flow of electricity. Without a switch, the light bulb will remain on as long as the wires are connected to the cell.

• In addition to a switch, a fuse or a circuit breaker is also necessary to protect the circuit from overloading and potentially causing a fire or other hazards.

Therefore, it is important to use a complete and properly functioning circuit with all necessary components.

Answer 2

Answer: A switch

Explanation: Yes, something is missing. In an electric circuit, a switch is necessary to control the flow of current. Without a switch, the circuit is always closed and the current is always flowing, which can be dangerous and can cause the light bulb to burn out quickly. Additionally, a fuse or circuit breaker is also necessary to protect against power surges or other electrical problems that could damage the circuit or cause a fire.