The color of light emitted by light emitting diode depends upon:
Correct answer: D. type of semiconductor
- A. forward voltage
- B. reverse current
- C. forward current
- D. type of semiconductor
Explanation
LEDs are semiconductors that convert electrical energy into light energy. The color of the emitted light depends on the type of semiconductor material. Depending on which LEDs can be classified into three wavelengths: ultraviolet, visible, and infrared, Among the above options, options 'A, 'B, and C' have nothing to do with the color of light emitted by LEDs. Therefore, they are eliminated.
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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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