Theory and Principles of a Simple Flashlight Circuit - JSS1 Basic technology Lesson Note

A flashlight circuit consists of a few key components that work together to produce light. At its core, the circuit includes a power source (usually batteries), a switch, and a light source (typically an LED or bulb). When the switch is turned on, it closes the circuit, allowing electrical current to flow from the batteries through the light source, illuminating it. The fundamental principle here is Ohm's Law, which relates voltage (V), current (I), and resistance (R) in an electrical circuit: \( V = I \times R \). Understanding this relationship helps in designing circuits that work efficiently and safely.