Below are the answers key for the Textbook Assignment: Chapter 3, "Direct Current" from the Module 1 — Introduction to Matter, Energy, and Direct Current 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. B. (a) Es (b) R1
2. D. Open
3. D. Schematic diagram
4. D. (a) Decrease (b) increase
5. A. (a) Increase (b) decrease
6. C. (E = IR)
7. B. 75 V
8. D. 40 A
9. A. Power
10. B. Current
11. D. Each of the above
12. C. 3 A
13. B. 240 W
14. B. Wirewound
15. A. 7.46 kWh
16. D. 0.785
17. C. 180 Ω
18. C. 540 V
19. C. 180 V
20. A. 120 V
21. B. The source voltage would have to be decreased
22. A. 240 W
23. A. 720 W
24. C. Negative
25. B. 25 V
26. C. 0.33 A from Y to X
27. A. Open
28. B. Short
29. A. R1 will be destroyed
30. A. 2.5 V
31. D. (a) 97.5 V (b) 97.5 V
32. A. Ri = RL
33. A. Equal
34. C. 50%
35. B. 60 V
36. D. (a) Equals (b) divides
37. D. It is leaving a junction
38. A. 100 Ω
39. B. 20 Ω
40. C. 30 Ω
41. D. Equivalent resistor
42. D. 120 V
43. B. 2 A
44. A. 8 Ω
45. C. 1.8 kW
46. D. 1200 W
47. B. 15 Ω
48. C. 60.0 W
49. B. 12 V
50. D. 15 Ω
51. C. 52 V
52. D. (a) Becomes infinite (b) Decreases to zero
53. A. (a) Increases (b) decreases
54. D. (a) Decreases (b) increases
55. D. (a) Decreases (b) increases
56. D. None
57. A. The current of the source
58. C. 30 mA
59. C. 5 k
60. B. 330 mA
61. C. The voltage drop across R1 depends on the value of load 1
62. A. By adding IR1and the current requirement of load 1
63. C. By subtracting the voltage requirement of load 1 from the voltage requirement of load 2
64.
65.
66. A. It provides the desired resistance with resistor values that are easily obtainable
67. A. ground between two of the dividing resistors
68. D. All voltages
69. B. Report the malfunction to a qualified technician
70. B. The first person on the scene
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