InterviewSolution
| 1. |
How LED works? |
|
Answer» Working Principle: A light-emitting diode is a two-lead semiconductor light source. It is a p–n junction diode that emits light when activated. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. LED technology: how a LED works The LED is a specialised form of PN junction that uses a compound junction. ... The light emitting diode emits light when it is forward biased. When a voltage is applied across the junction to make it forward biased, current flows as in the case of any PN junction. working Principle: Alight-emitting diode is a two-lead semiconductorlightsource. It is a p–n junction diode that emitslightwhen activated. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. |
|