QUIZ 6

4, 6, 8, 10, 22, 30, 36, 38, 42, 58, 92

4. 29 ohms

6. (a) 13 ohms (b) 8600C

8. 0.0031 V

10. (a) 5.5 (A) (b) 7.6 (A)

22. (a) 0.00038 ohms (b) 0.0015 ohms (c) 0.006 ohms

30. (a) (rho)*(ln r₂/r₁)/(2*pi*L) (b) 0.00058 ohms (c) 0.51 ohms

36.(a) 850 W setting has the highest resistance (b) 17 ohms (c) 12 ohms

38. 1/4 as bright in the US compared to Europe.

42. (a) 7.9 ohms and 1.1 W (b) power increased by a factor of 4

58.(a) 0.029 ohms (b)1.6x10^-8 ohm-m (c) 2.4x10⁵ A/m² (d) 0.0038 V/m (e) 8.8x10²⁸ electrons/m³

92. right end, 160000 ; left end , 410000 A/m² .