# Solution Manual For Electronics Fundamentals: A Systems Approach, 1st Edition

Preview Extract
CHAPTER 2 VOLTAGE, CURRENT, AND RESISTANCE BASIC PROBLEMS SECTION 2-2 Electrical Charge 1. Q = (charge per electron)(number of electrons) = (1.6 ๏ด 10๏ญ19 C/e)(50 ๏ด 1031e) = 80 ๏ด 1012 C 2. (6.25 ๏ด 1018 e/C)(80 ๏ด 10๏ญ6 C) = 5 ๏ด 1014 e 3. The magnitude of the charge on a proton (p) is equal to the magnitude of the charge on the electron (e). Therefore, (1.6 ๏ด 10-19 C/p)(29 p) = 4.64 ๏ด 10-18 C 4. (1.6 ๏ด 10-19 C/p)(17 p) = 2.72 ๏ด 10-18 C SECTION 2-3 Voltage V ๏ฝ W 10 J = 10 V ๏ฝ Q 1C 5. (a) 6. V ๏ฝ W 500 J =5V ๏ฝ Q 100 C 7. V ๏ฝ W 800 J = 20 V ๏ฝ Q 40 C 8. W = VQ = (12 V)(2.5 C) = 30 J 9. V= (b) V ๏ฝ W 5J = 2.5 V ๏ฝ Q 2C (c) V ๏ฝ W 100 J =4V ๏ฝ Q 25 C (b) I๏ฝ Q 10 C ๏ฝ = 20 A t 0.5 s (c) I๏ฝ Q 5C ๏ฝ = 2.5 A t 2s W 2.5 J = = 12.5 V Q 0.2 C SECTION 2-4 Current 10. I= 11. (a) 12. Q 0.2 C = = 20 mA t 10 s Q 75 C ๏ฝ = 75 A t 1s Q 0.6 C I๏ฝ ๏ฝ = 0.2 A t 3s I๏ฝ 7 Q ; t Q 10 C =2s ๏ฝ I 5A 13. I๏ฝ 14. Q = I ๏ด t = (1.5 A)(0.1 s) = 0.15 C t= SECTION 2-5 Resistance 15. A: B: C: Blue, gray, red, silver: 6800 ๏ ๏ฑ 10% Orange, orange, black, silver: 33 ๏ ๏ฑ 10% Yellow, violet, orange, gold: 47,000 ๏ ๏ฑ 5% 16. A: Rmin = 6800 ๏ ๏ญ 0.1(6800 ๏) = 6800 ๏ ๏ญ 680 ๏ = 6120 ๏ Rmax = 6800 ๏ + 680 ๏ = 7480 ๏ Rmin = 33 ๏ ๏ญ 0.1(33 ๏) = 33 ๏ ๏ญ 3.3 ๏ = 29.7 ๏ Rmax = 33 ๏ + 3.3 ๏ = 36.3 ๏ Rmin = 47,000 ๏ ๏ญ (0.05)(47,000 ๏) = 47,000 ๏ ๏ญ 2350 ๏ = 44,650 ๏ Rmax = 47,000 ๏ + 2350 ๏ = 49,350 ๏ B: C: 17. (a) (b) 1st band = red, 2nd band = violet, 3rd band = brown, 4th band = gold 330 ๏; orange, orange, brown, (B) 2.2 k๏: red, red, red (D) 39 k๏: orange, white, orange (A) 56 k๏: green, blue, orange (L) 100 k๏: brown, black, yellow (F) 18. (a) (b) (c) 36.5 ๏ ๏ฑ 2% 2.74 k๏ ๏ฑ 0.25% 82.5 k๏ ๏ฑ 1% 19. (a) (b) (c) Brown, black, black, gold: 10 ๏ ยฑ 5% Green, brown, green, silver: 5,100,000 ๏ ยฑ 10% = 5.1 M๏ ยฑ 10% Blue, gray, black, gold: 68 ๏ ยฑ 5% 20. (a) (b) (c) 0.47 ๏ ยฑ 5%: yellow, violet, silver, gold 270 k๏ ยฑ 5%: red, violet, yellow, gold 5.1 M๏ ยฑ 5%: green, brown, green, gold 21. (a) (b) (c) Red, gray, violet, red, brown: 28,700 ๏ ยฑ 1% = 28.7 k๏ ยฑ 1% Blue, black, yellow, gold, brown: 60.4 ๏ ยฑ 1% White, orange, brown, brown, brown: 9310 ยฑ 1% = 9.31 k๏ ยฑ 1% 22. (a) (b) (c) 14.7 k๏ ยฑ 1%: brown, yellow, violet, red, brown 39.2 ๏ ยฑ 1%: orange, white, red, gold, brown 9.76 k๏ ยฑ 1%: white, violet, blue, brown, brown 23. (a) (c) (e) 220 = 22 ๏ 823 = 82 k๏ 560 = 56 ๏ 24. 500 ๏, equal resistance on each side of the contact. (b) (d) (f) 472 = 4.7 k๏ 3K3 = 3.3 k๏ 10M = 10 M๏ 8 SECTION 2-6 The Electric Circuit 25. There is current through Lamp 2. 26. See Figure 2-1. Figure 2-1 SECTION 2-7 Basic Circuit Measurements 27. See Figure 2-2(a). Figure 2-2 28. See Figure 2-2(b). 29. Position 1: V1 = 0 V, V2 = VS Position 2: V1 = VS, V2 = 0 V 30. See Figure 2-3. 31. On the 600 V DC scale: 250 V 32. R = (10)(10 ๏) = 100 ๏ 33. (a) (b) (c) 34. Figure 2-3 2(100 ๏) = 200 ๏ 15(10 M๏) = 150 M๏ 45(100 ๏) = 4500 ๏ Figure 2-4 See Figure 2-4. 9 ADVANCED PROBLEMS Q t Q = I ๏ด t = (2 A)(15 s) = 30 C W 1000 J V= = 33.3 V ๏ฝ Q 30 C 35. I= 36. I= 37. Total wire length = 100 ft Resistance per 1000 ft = (1000 ft)(6 ๏/100 ft) = 60 ๏ Smallest wire size is AWG 27 which has 51.47 ๏/1000 ft 38. (a) (b) (c) 39. The circuit in (b) can have both lamps on at the same time. 40. There is always current through R5. 41. See Figure 2-5. Q t Q = (number of electrons) / (number of electrons/coulomb) Q 9.184๏ด 10๏ญ2 C 574๏ด 1015 e ๏ญ2 Q= = 9.184 ๏ด 10 C I = = 0.367 A ๏ฝ t 250๏ด 10๏ญ3 s 6.25 ๏ด 1018 e/C 4R7J = 4.7 ๏ ๏ฑ 5% 560KF = 560 k๏ ๏ฑ 1% 1M5G = 1.5 M๏ ๏ฑ 2% Figure 2-5 42. See Figure 2-5. 10 43. See Figure 2-6. Figure 2-6 44. See Figure 2-7. 11

## Document Preview (5 of 280 Pages)

User generated content is uploaded by users for the purposes of learning and should be used following SchloarOn's honor code & terms of service.
You are viewing preview pages of the document. Purchase to get full access instantly.
-37%

### Solution Manual For Electronics Fundamentals: A Systems Approach, 1st Edition

\$18.99 Save:\$11.00(37%)