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Applied Physics 1: Semiconductor Physics
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Applied Physics 1: Semiconductor Physics
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25 Questions

1. p>20.How are charge carriers produced in intrinsic semiconductors?
2. Which of the following is not a characteristic of LED?
3. Which of the following materials can be used to produce infrared LED?
4. Which column elements are combined to make compound semiconductors?
5. Is it true, when the temperature rises, the electrons in the conduction band becomes greater than the donor atoms?
6. The region where the electrons and holes diffused across the junction is called ________
7. The amount of photo generated current increases slightly with an increase in _________
8. When the source of light is not sun light then the photo voltaic cell is used as ____________
9. What should be the biasing of the LED?
10. Organic polymer solar cells are made from Polyphenylene.
11. The voltage at which forward bias current increases rapidly is called as ___________
12. Zener Diode is mostly used as ____________
13. What type of material is obtained when an intrinsic semiconductor is doped with pentavalent impurity?
14. What should be the band gap of the semiconductors to be used as LED?
15. What are the charge carriers in semiconductors?
16. Increase in the forward current always increases the intensity of an LED.
17. __________ photo voltaic devices in the form of thin films.
18. What is the level of doping in Zener Diode?
19. __________ is one of the most important materials is also known as solar grade silicon.
20. The volt is the units of emf that was named after its inventor _________
21. The reverse breakdown voltage of LED is very low.
22. The leakage current is measured in ________
23. Which of the following is known as indirect band gap semiconductors?
24. __________ is a direct band gap material.
25. What is the bandwidth of the emitted light in an LED?

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