Physics · Semiconductor Devices
Which one of the following statements is true for a Light Emitting Diode (LED)?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It emits light when electrons are accelerated by the high electric field in the depletion region under reverse bias.
- 2It emits light due to the heating effect caused by electron collisions with atoms.
- 3It emits light under forward bias when electrons are injected from the n-region to the p-region and holes from the p-region to the n-region.✓
- 4It emits light when both electrons and holes are injected from the n-region to the p-region.
Correct answer
It emits light under forward bias when electrons are injected from the n-region to the p-region and holes from the p-region to the n-region.
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