Below are the answers key for Multiple Choice Questions in Chapter 2: Semiconductors from the book Electronic Principles 7th Edition by Albert Malvino. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam.
1. d. 29
2. a. 0
3. b. + 1
4. b. Weak
5. d. 4
6. c. Silicon
7. b. 14
8. b. Crystal
9. c. Thermal energy
10. a. Covalent bond
11. c. Recombination
12. c. An insulator
13. b. Lifetime
14. b. Free electron
15. a. 1
16. b. 2
17. d. None of the above
18. b. None
19. a. Equals the number of holes
20. a. -273 degrees C
21. d. No holes or free electrons
22. a. A few free electrons and holes
23. b. Increases
24. b. Right
25. d. Positive charges
26. b. 3
27. d. 5
28. a. Acceptor atoms
29. c. n-type
30. c. Only those produced by thermal energy
31. a. 1
32. c. More than 1 billion
33. b. Right
34. a. Conductor
35. b. 25 degrees C
36. c. 8
37. d. Lost an electron
38. a. Neutral
39. b. Negative ions
40. a. Neutral
41. C. Ions
42. b. Recombination
43. b. 0.7 V
44. c. 0.7 V
45. a. Very small
46. c. Reverse current
47. d. Breakdown voltage
48. d. The depletion layer
49. b. Becomes larger
50. d. All of the above
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