In LED when an electron combines with a _ during forward bias conduction, a photon of visible light is emitted.
Correct answer: C. Hole.
- A. High voltage.
- B. Photon.
- C. Hole.
- D. Positron.
Explanation
A hole or an electron hole is a point in an atom, a lattice or a structure where an electron can exist but does not because it has been excited to a higher energy level. when it returns to its normal energy level it emits a photon.
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About PN Junction
A PN junction forms when p type and n type semiconductor regions meet, creating a depletion layer and a potential barrier. The topic covers forward and reverse bias, diode current voltage characteristics, breakdown and rectification, while distinguishing an ordinary junction diode from a transistor formed from multiple junctions.
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