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8.1. = 0,2 = - 0,6 5 . 䳿 .
8.2. , r = 7,6∙10-5 , ? .
8.3. = 1,67 = 3,33 20 . , , = - 0,67 , ? .
8.4. 0,1 , 0,23 . .
8.5. ³ = 100 = - 50 10 . , 䳺 = 1 , 12 10 .
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8.6. q = 2,3 . , , 䳺 , ?
8.7. l = 20 . ϳ 0,4 60 . .
8.8. m = 0,1 l = 20 . , a = 30 ?
8.9. , , 0,510 .
8.10. q, , l = 1,2 m = 2 q. , T = 3,2 , a = 25 .
8.11. = 1,5 /, , , m = 1 q = 0,2 . , l = 20 . α = 300. .
8.12. ҳ m = 3 q = 10 , , α = 900 . , β = 600 . ҳ , = 1 /.
8.13. , , . , ? ρ = 800 / 3, ε = 2.
8.14. = 8 = - 6 , 10 .
8.15. 10 . , .
8.16. , , = 200 /. , R = 0,510-10 .
8.17. = 6,7 = 13,3 40 . , 25 ?
8.18. = 3 = - 2 , a = 0,1 . = 0,5 1 2 (. 8.1).
8.19. 5 150 . , 10 . . 8.1
8.20. 0,04 R = 1 , . ϳ , , = 490 . , , 10 .
8.21. = 10,33 , = - 0,66 , = 0,99 = - 1,32 . , 20 .
8.22. ³ = 1 = - 2 10 . , 9 7 .
8.23. , 0,2 . q 1= q 2 = 610-7 . q 3= - 810 . .
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8.24. , , = 4∙102 / = 3∙102 /, , l = 2,7 2 . .
8.25. ³ φ = 12 . . .
8.26. R 1 = 4 R 2 = 6 , φ 1 = 9 φ 2 = 3 , 璺 . 璺.
8.27. 10 , 5000 , 5 . , ?
8.28. ̳ , 4,8 , , 10 . , U = 1 ? ϳ = 6 / 2. ?
8.29. , d = 1 , . = 0,1 /. U = 200 , = 0,5 /. . h = 1,8510 , r = 0,910 / .
8.30. , a = 0,1 . = 3 . , : 1) ; 2) , .
8.31. , q = 6 , l = 10 , φ = 200 , R = 2 ?
8.32. , 200 ?
8.33. 1 10 , 600 , , . , 20 /.
8.34. m = 10-7 , q = 1 3000 /. q 1 = 10 ?
8.35. b = 30 a - , = 1600 . l = 3 . : 1) a - ; 2) ; 3) a - . . , .
8.36. = 10 / . : 1) ; 2) , t = 1 ; 3) ; 4) , . = 0.
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8.37. , 5,3 , 10 /. : 1) ; 2) ; 3) .
8.38. 910 /. 10 . г 100 , 1 .
8.39. . U = 300 . ³ d = 2 , l = 10 . , ?
8.40. = 10 /. = 100 /, l = 5 . .
8.41. 3,610 /. . 20 . 37 /. 䳺 ?
8.42. - 㳺 = 8 = 4 , d = 2 . , , , y = 0,8 ?
8.43. l = 30 t = 1 /. r = 20 q = 10 . . 䳿 .
8.44. l = 20 . = 10 q = 40 , 䳺 F = 6 . .
8.45. τ = 1,5 /. , d = 12 , q = 0,2 . 䳿 .
8.46. г , l = 20 , τ = 10 /. = 10 , , q = 1 . F 䳺 ?
8.47. , R = 1 σ = 0,3 /2, q = 15 . , 䳺 , r = 10 .
8.48. 10 t = 10 /. , 10 .
8.49. ϳ t = 0,1 /. , 10 .
8.50. t = 10 /. , r 1 = 5 r 2 = 10 .
8.51. t = 31,8 /.
8.52. R = 8 t = 10 /. , r = 10 .
8.53. R = 10 q = - 5 . , L = 0, 5, 8, 10 15 . = f (L). , L .
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8.54. R = 20 s = 2 / . , l = 10 .
8.55. R = 10 , q = - 20 , q = 20 . , r = 10 r = 20 .
8.56. . σ = 3 / 2.
8.57. , , r = 15 . , σ = 2 / 2 .
8.58. = 30 , r = 1 (. 8.2). , α = 300 , . ˳ τ = 30 /.
. 8.2
8.59. s = 10 / . , , = 10 .
8.60. r1 = 4 r2 = 12 . , U = 1200 .
8.61. s = 2 / s = - 4 / . . , .
8.62. / = 10 . , 10 .
8.63. , R = 5 R = 10 , q = 20 q = - 10 . , r = 3 , 8 14 . .
8.64. q = 0,15 , r = 20 R = 25 . , r 1 = 10 r 2 = 50 .
8.65. R = 1 t = 20 /. , = 0,5 = 2 .
8.66. R = 2 . ᒺ 2 / . , r = 1 r =3 , . = f(r) j = f(r).
8.67. R = 2 R = 4 t = 0,31 / t = - 0,31 /. , r = 3 r = 6 , .
8.68. , , s = 2 / ?
8.69. q = 0,7 . ϳ 䳺 2 , = 5 . .
8.70. q = 10 1 2, , 0,03 . σ = 0,4 / 2.
8.71. r = 4 q = 0,7 . ϳ 䳺 r = 2 = 5 . .
8.72. τ = 20 /. q = 1 . ?
8.73. q = 210-8 , 1 1 σ = 1 / 2 ?
8.74. q = 50 10 . , ?
8.75. 䒺 . 2 , 60 . , 5 ?
8.76. s = 4 / m = 1 q = 1 . .
8.77. m = 1 l = 15 , , s = 4 / . , q = - 1 .
8.78. τ = 2 /. , 1 0,5 ?
8.79. . 䳺 , = 1 , = 4 , a - 210 / 310 /. .
8.80. , 10 , , 13 16 . 2105 / 2106 /. .
8.81. R = 5 , τ = 20 /, α - . α - , = 40 .
8.82. . ?
8.83. , = 1,21014 ∙, , r = 10 .
8.84. , 50 , 1 , 5 .
8.85. = 2 , = 30 /. α = 600 . , β = 300.
8.86. = 10 ∙ = 50 /. 㳿 900.
8.87. = 3∙102 / , α = 300 . , = 4∙10-9 ∙.
8.88. R = 10 q = 6 , 2 . , ε = 3.
8.89. = 5 / S = 100 2. ?
8.90. 0,2 , , 400 .
8.91. , (ε = 6) 2 , 200 . , , .
8.92. (ε = 6). ³ 4 . 1200 . : 1) ; 2) ; 3) ; 4) .
8.93. 7 (ε = 2) q = 11∙10-9 . .
8.94. 2,510-4 . 0,05 . ?
8.95. , 5 , 200 䒺 . , 10 ?
8.96. 40 , 1000 , 璺 8 . , 璺.
8.97. 200 , 2 . ρ = 2,7103 / 3.
8.98. , 792 , σ = 3,33107 / 2. .
8.99. 300 䒺 1 = 2 2 = 3 . 璺.
8.100. 璺 1 , 2 3 䒺 220 . ?
8.101. 1= 2 2 = 3 q 1 = 4∙10-6 q 2 = 9∙10-6 . г 璺 . 璺.
8.102. 1 500 璺 4 . 100 . 1.
8.103. (. 8.3), 0,5 .
8.104. 1 = 1 , 2 = 2 3 = 3 璺, . 8.3, 䒺 U = 12 . .
8.105. (. 8.4), 1 = 2 , 2= 1 .
. 8.3 . 8.4
8.106. R 1 = 1 , R 2= 4 . ̳ U = 3 . 3 ?
8.107. R 1= 1 , R = 4 . ̳ U = 3 . , r 1 = 3 r 2 = 2 ?
8.108. R 1 = 5 R 2 = 5,2 , . 10 . .
8.109. R 1 = 1,5 , R 2 = 3,5 . ̳ U = 2,3 . 䳺 , r 1 = 2,5 r 2 = 2 ? r 1 r 2 ?
8.110. , . , 1,5 , 3 3,2.
8.111. ̳ . 1 . , 3 ?
8.112. ε 1 = 2 ε 2= 6 , (. 8.5). , 200 2, 6 . .8.5
8.113. d 1= 8 . , 100 2, 10 .
8.114. ̳ , 1 , 100 . (ε = 173) 9,5 . ϳ 䒺 . ?
8.115. ̳ , d = 1 , U = 300 . d 1 = 0,5 d 2 = 0,5 . : 1) ; 2) .
8.116. ̳ (ε = 7) 3 . 1000 . .
8.117. ̳ (ε = 6). , 10 /?
8.118. d 1 = 7 d 2= 2 ε = 6. , U = 400 ?
8.119. , , σ = 11,3 / 2 φ = 4,5 . , , .
8.120. 2 , , 3 . ϳ 璺, 0,4 . ?
8.121. d 1 = 6 S = 200 2 d 2 = 3 . , ε = 8, 䒺 U = 600 .
8.122. d 1 = 3 S = 60 2 d 2 = 1 . , , 䒺 U = 2 .
8.123. , S = 200 2, d 1= 0,3 , , d 2 = 0,5 . : 1) U = 600 䒺 ; 2) U = 600 .
8.124. , S = 400 2, . . (ε 1 = 2) d 1 = 0,2 , (ε 2= 7) d 2= 0,3 . U = 600 . .
8.125. 1 = 1 , 2= 4 3 = 10 璺 䒺 . , W 2= 2∙10-3 .
8.126. 1 = 4 , 2= 3 q 1= 10-4 ; q 2 = 10-5 璺 . 㳿 .
8.127. 璺 , 1 = 4 2 = 6 , 2 䒺 . , 璺 ?
8.128. 60 400 . ϳ 1,2 . .
8.129. 600 1,5 䒺 . 400 . , , 璺 .
8.130. ᒺ 㳿 : 1) 2 1 ; 2) ; 3) 2 . 16,7 / 2, 1,6710 7 /. 2.
8.131. q 1 = 4,8∙10-9 , = 17,8 , 䳺 F = 9,81∙10-5 . S = 10-2 2. : 1) ; 2) ; 3) ᒺ 㳿 ; 4) .
8.132. 3 400 2 2 /, . : 1) ; 2) , ; 3) , ; 4) .
8.133. ³ d = 2∙10-3 , φ = 600 . q = 40 . .
8.134. R 1 = 10 φ 1 = 2700 䒺 . ϳ 璺 , , R 2 = 5 . : 1) ; 2) 璺; 3) 璺; 4) 璺; 5) , 璺.