IGCSE Physics – Electricity Practice Test

LED stands for Light Emitting Diode. The idea here is a diode—a semiconductor device that conducts current mainly in one direction—designed to emit light when forward biased. As current flows, electrons and holes recombine in the semiconductor and release photons, producing visible light. This makes LEDs efficient light sources for indicators, displays, and lighting.

The other phrasings don’t match the established name of the component. A display is a device that shows images, not the actual light-emitting component. A general term like Light Emission Device is non-specific, and Luminescent Electronic Device uses a different wording that isn’t the standard name for this part.