1.

How does a light emitting diode (LED) work? Give two advantages of LED’s over the conventional incandescent lamps

Answer»

A light emitting diode is simply a forward biased p-n junction which emits spontaneous light radiation. At the junction, energy is released in the form of photons due to the recombination of the excess minority charge carrier with the majority charge carrier.
Advantages
(i) Low operational voltage and less powder.
(ii) Fast action and no warm up time required.



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