Special Diodes: Important Part B Questions

Electron Devices

Chapter 3: Special Diodes

Important Part B Questions

1. Explain the breakdown mechanisms in zener diode.

2. Distinguish between zener and avalanche breakdown.

3. Draw the VI characteristics of zener diode and explain its operation.

4. Explain the dynamic resistance and equivalent circuit of a zener diode.

5. Explain the zener diode parameters.

6. Compare zener diode and the conventional p‒n unction diode.

7. State the applications of zener diode.

8. Explain the principle of working of zener diode as a regulator.

9. Discuss the performance of zener diode regulator interms of the source and load effects.

10. What is varactor diode? How capacitance of a diode varies with reverse voltage?

11. Explain the principle behind the varactor diode and list out its application.

12. Write a note on varactor diode.

13. Describe the construction, the symbol, V‒I characteristics and applications of tunnel diode.

14. With energy band diagram, explain the theory and characteristics of tunnel diode.

15. Write short note on tunnel diode.

16. What is the difference between the Tunnel diode and ordinary PN diode ?

17. Discuss the working principle of a photodiode.

18. What is photodiode ? Explain its construction and operation.

19. Explain the V‒I characteristics of photodiode.

20. State the advantages, disadvantages and applicaitons of photodiode.