Chapter 31 62. 5.58 A 66. (a) 1.26 mT (b) 0.628 J/m³ Chapter 32 30. 750 kV/s 32. 7193 GV/(ms) 34. (a) 21.2 nA down (b) CW from above 38. (a) (4/3) A (b) at R/4 and at 4R Chapter 33 Q4. (a) L2 > L1 (b) I1 > I2 (you must explain why) Q6. (a) decreases (b) stays the same (you must explain why) 2. 45.2 mA 4. (a) 6 microseconds (b) 167 kHz (c) 3 microseconds 8. 37.8 microH 10. proof 12. (a) 3.6 mH (b) 1326 Hz (c) 189 microseconds 16. (a) Q/2 (b) (sqrt3/2)I 32. 0.6 A for all frequencies 34. (a) 5.22 mA (b) zero (c) 4.52 mA 36. (a) 39.1 mA (b) zero (c) -33.9 mA 44. (a) 16.6 Ohms (b) 422 Ohms (c) 521 mA (d) 33.2 Ohms (e) 408 Ohms (f) 539 mA 48. (a) 796 Hz (b) same (c) decrease (d) increase 50. 100 V (you must carefully explain why) 52. (a) taking energy (b) supplying energy 54. proof plus explanations for limiting cases 60. (a) 76.4 mH (b) yes; 17.8 Ohms; resistor would consume energy, not store it G1. proof G2. proof G3. proof G4. proof Chapter 34 Q2. into the page 2. (a) 4.71 mHZ (b) 212 s 6. 4.74 m 14. 1.19 MW/m² 16. Bmax = 3.42 microT; Emax = 1.03 kV/m 34. 4.55 x 10^-4 38. 19.0 W/m² 40. (a) 15.9% (b) 84.1%