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प्रश्न
An LED emits visible light when it's ______.
विकल्प
Junction is reverse biased.
Depletion region widens.
Holes and electrons recombine.
The junction becomes hot.
उत्तर
An LED emits visible light when its holes and electrons recombine.
Explanation:
Because on recombining of electrons and holes current flow occurs in PN junction diode and thus LED emits light.
संबंधित प्रश्न
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