Final answer:
A flashlight is a system that converts electrical energy into light energy. Its inputs are electrical current and the user's action of turning on the switch, while its output is the emission of light. The parts of a flashlight system include batteries, bulb, switch, reflector, and casing.
Step-by-step explanation:
A flashlight can be defined as a system that converts electrical energy into light energy. The inputs of a flashlight system are electrical current from the batteries and the user's action of turning on the switch. The output is the emission of light from the flashlight.
The parts of a flashlight system include:
- Batteries: provide electrical energy
- Bulb: converts electrical energy into light energy
- Switch: controls the flow of electricity
- Reflector: directs and enhances the light output
- Casing: protects and holds the components together