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What is PN junction?
what is semiconductor?
what is LED and explain it's functions?
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PN junction is the junction between PN junction diode that devides the hole carrying P region to the electrons carrying N region.
Semiconductor is a device that is made by introducing impurities in insulators so that it can conduct electricity.
LED (Light Emitting Diode) is a specially designed forward biased PN junction diode which emits light spontaneously when energised.
hope it may help u.
-------------->> ...better reference from "Nootan ISC physics XII" by "Nageen Prakashan"
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