The color of LED depends upon
Correct answer: C. type of semiconductor material used
- A. its forward biased
- B. its reverse biased
- C. type of semiconductor material used
- D. type of doping
Explanation
The color of a Light Emitting Diode (LED) primarily depends on the semiconductor material used in its construction. Different semiconductor materials emit different colors of light when current passes through them. For example, gallium arsenide phosphide (GaAsP) emits red light, while gallium phosphide (GaP) emits green light.Incorrect Options and Explanations: (a) its forward biased - LED's color is not primarily determined by its biasing. (b) its reverse biased - LED's color is not primarily determined by its biasing. (d) type of doping - While doping can affect LED characteristics, it is not the primary factor determining LED color.
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A p-n junction forms when p-type and n-type semiconductor regions meet, creating a depletion layer, barrier potential and rectifying action. The work covers forward and reverse bias, junction current, diode characteristics, and how a diode converts alternating current into pulsating direct current through half-wave and full-wave rectification.
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