The color of light emitted by a light-emitting diode depends upon
Correct answer: C. Forward current
- A. Forward voltage
- B. Reverse current
- C. Forward current
- D. Type of semiconductors
Explanation
The color of light emitted by an LED depends on the semiconductor material used in its construction, which determines the energy bandgap. The forward current passing through the LED affects the intensity of the emitted light but does not directly affect its 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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