Question
An LED is useful because when a current passes through it, it gives out __ what? Enter your answer
Answer
3.3
(327 Votes)
Oliver
Master · Tutor for 5 years
Answer
Light
Explanation
A Light-Emitting Diode (LED) is a two-lead semiconductor light source. When a current passes through an LED, the LED emits or gives out light. This phenomenon takes place due to the phenomenon known as electroluminescence. The LED is designed in such a way that it only allows the flow of current in one direction i.e., from the positive end (anode) to the negative end (cathode). So, if any direct current passes through the LED, the electron holes get filled with severaloving electrons producing energy in the form of photons, which is light that gets emitted.