2.9 - Light Emitting Diode (LED)
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What is an LED?
💡 Hint: Think about what happens when you connect it to a power source.
Name one material used in the construction of LEDs.
💡 Hint: Consider the name of the compound mentioned.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What does LED stand for?
💡 Hint: Consider what role illumination plays in the acronym.
LEDs can work in reverse bias.
💡 Hint: Think about how other diodes behave under reverse bias.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
Describe a scenario in which LEDs can replace traditional incandescent bulbs, specifying their advantages.
💡 Hint: Consider factors like energy savings and replacement frequency.
If an LED emits red light, what can you infer about the energy band gap of the semiconductor used? Discuss its implications for the LED's application range.
💡 Hint: Think about how band gap energy relates to the color of light produced.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.