Viva Questions
1. Why silicon is preferred over germanium in the construction of diode ?
2. What is the effect of temperature on the diode ?
3. Explain the following terms:
(a) static resistance
(b) bulk resistance
(c) junction resistance
(d) a.c. or dynamic resistance
(e) reverse resistance of diode
4. What are the applications of a diode?
5. What is the diode current equation?
6. What is the difference between Drift current and Diffusion current?
7. What is reverse saturation current ?
8. What is reverse recovery time?
9. Draw the symbols of all types of diodes?
10. What is the difference between zener breakdown & avalanche breakdown?
11. Draw the zener diode equivalent circuit?
12. What are the applications of zener diode?
13. What is the difference between zener diode & general diode?
14. What is the difference between zener break down & avalanche break down?
15. Explain the working of zener diode as a regulator?
16. Draw the input/output characteristics of CB configuration of transistor?
17. Define the current gain for CE configuration & CB configuration?
18. Drive the relationship between α and β?
19. Compare the performance of CB , CE & CC configuration on the basis of :
20. Input resistance
21. Output resistance
22. Current gain
23. Voltage gain
24. 5. Explain the term base-width modulation or early effect?
25. 6. Why CE is preferred over CB & CC configuration?
26. 7. What is phototransistor?
27. 8. Differentiate emitter, base & collector on the basis of their construction?
28. 9. What is heat sink?
29. 10. Draw the current analogy of the PNP transistor?
30. Exlapin FET(Field effect transistor)?
31. Explain JFET(junction field effect transistor)?
32. Compare FET(Field effect transistor) with BJT(Bipolar junction transistor)?
33. What is the difference between enhancement MOSFET & depletion MOSFET?
34. Draw the symbol of enhancement MOSFET & depletion MOSFET?
35. What is the advantage of enhancement MOSFET over depletion MOSFET?
36. Draw the transfer characteristic of depletion MOSFET?
37. What is inversion layer?
38. Explain threshold voltage?
39. What are the applications of MOSFET?
40. Explain sinusoidal or harmonic oscillator & non sinusoidal oscillator?
41. Explain various types of sinusoidal oscillator?
42. Explain tank circuit?
43. Explain barkhausen criterion?
44. What is the meaning of feedback?
45. Explain positive feedback & negative feedback?
46. What are the advantages & disadvantages of negative feedback?
47. What are the advantages & disadvantages of positive feedback?
48. What is the application of sinusoidal oscillator?
49. Explain damped oscillation & undamped oscillation?
50. Why operational amplifier is called the operational amplifier?
51. What are the ideal characteristics of the operational amplifier?
52. What do you mean by slew rate?
53. Define common mode rejection ratio?
54. What is the importance of common mode rejection ratio (CMMR)?
55. What is the difference between the Integrator and differentiator?
56. What do you mean by input offset voltage?
57. What do you mean by input offset current?
58. What is the bias current?
59. What do you mean by differential amplifier?
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