Question

What is a Light Emitting Diode? Draw its circuit symbol.

Hint:

LEDs are more energy-efficient than incandescent bulbs and have a longer lifespan, making them ideal for use in displays and indicators.

Answer 1

A Light Emitting Diode (LED) is a semiconductor device that emits light when current flows through it in the forward direction. It operates based on the principle of electroluminescence, where electrons recombine with holes, releasing energy in the form of photons (light). The circuit symbol for an LED is: