Answers to self-assessment
tests and problems
Chapter 1Self-assessment test- second; newton; kilogram. 2. coulomb; newton; volt. 3. [M L 2 T -2 A-l]. 4. [M T -2 A-l].
- [M L T -3 A-l]. 6. (a) 30 x 10 -3 A; (b) 25 x 106 IxA; (c) 10 x 109 mW; (d) 25 x 10 -9 C; (e)
150 x 10 -3 nF; (f) 60 x 10 -3 GW; (g) 150 x 10 -3 mJ; (h) 220 x 10 -3 kfZ; (i) 55 x 109 ml]; (j)
100 x 10 -3 kN.
Problems- [L -1 A]. 2. [M L T -2 A-2]. 3. [T A]. 4. [L-2T A]. 5. [M L T -3 A-1]. 6. True.
- [M -~ L -3 T 4 A2]. 8. a = 2; b = 1.9. False, W = (L 12)/2. 10. a = 2; b = - 1; c = - 1.
- a = 2; b = -1; c = -2. 12. 0.145 MW.
Chapter 2Self-assessment test- (1) 3.33 It, (2) 30 ~, (3) 15 It. 9. 0.15 It. 11. Between 198 It and 242 12. 19. 16 IxH.
- 82 ~tH.
Problems- 0.5 fz. 2. 641]. 3. 4.041]. 4. 20 v. 5. 5 A. 6. 1 It. 7. 59.7 ~ 8. red, red, red, silver.
- Between 278 It and 338 It. 10. 4.29 txF, 7.14 ~F, 8.57 ~xF. 11. 125 ~H, 80 ~H, 100 IxH.
12. 405 IxH, 5 txH. 13. 0.919. 14. 9 A. 15. 2 mJ. 16. 1.44 kW.
Chapter 3Self-assessment test- 4 ~. 10. 30 fz. 11. 100 It, 900 It. 12. 110 It, 0 It, 0 It.
Problems- 1.49 A. 2. 3.64 A. 3. Eo = 30 V, Ro = 2 1),. 4. 720 mA (maximum), 11.5 mA (minimum).
- (a) 440 mA, (b) 9.87 mA, (c) 17.5 1]. 6. I1 = 224 mA, I2 = 188 mA, 13 = 8 mA,