Below are the answers key for the Textbook Assignment: Chapter 1, "Concepts of Alternating Current" from the Module 2 — Introduction to Alternating Current and Transformers in Navy Electricity and Electronics Training Series (NEETS) . Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam.
1. A. amplitude and direction
2. B. A resistor placed in series with the load
3. D. Ac can be readily stepped up or down
4. B. Amplitude versus time
5. A. A magnetic field
9. C. It is perpendicular to and equal along all parts of the conductor
10. D. All of these
11. B. magnetic field
12. A. Hysteresis loss
13. D. (a) Concentric circles (b) Perpendicular
14. A. Because separate lines of magnetic force link and combine their effects
15. B. (a) Minimum, (b) minimum
16. B. A sine curve
17. C. 180º
18. D. (a) 90º , (b) 270º
19. D. (a) 4, (b) 2
20. D. (a) Magnetic flux, north to south, (b) Current
21. A. (a) Ac, (b) sine wave
22. C. Frequency
23. B. Hertz
24. A. 1 Hz
25. A. 0.004 second
26. D. 1667 Hz
37. C. 1400 times
38. C. Instantaneous value
39. D. Effective value
40. B. The average value
41. C. Eavg = 0.636 x Emax
42. B. 38 volts
43. B. 140 volts
44. D. 9 volts
45. A. 2.9 amperes
46. D. 1.9 amperes
47. B. Ieff
48. C. Eeff
49. C. Eeff
50. A. 170 volts
51. B. Effective
52. C. Eeff = Emax x 0.707
53. A. 4.6 amperes
54. B. 11 volts
61. C. Never mix
62. B. 14.6 amperes
63. C. 20.01 amperes
64. D. 47.1
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