1. , . r 0 = 8 . . ?
2. Q 1 = - 50 Q 2 =100 
= 20 . F, Q 3 = 10 , , d = 30 .
3. m = 40 Q = 0.67 , . , 0.49 .
4. m =0.4 . r = 2.0 ; 2 . q.
5. , , E = 600 /. q = 0,8 × 10-18 . r . ρ = 13550 /3.
6. , d = 1.0 , m = 0.1 . , U = 1000 , α = 30 . Q.
7. , s 1 = 1 /2 s 2 = 3 /2. E : 1) ; 2) . , .
8. R = 10 r = 10 /3. :
1) r 1 =5 ; 2) r 2 =15 . = f (r).
9. R = 0.5 . q , . = 3.6 /. ρ = 13550 /3.
10. R = 10
q=-5 . , r, 0, 5, 8, 10 15 . E = f (r).
11. R 1 = 9 R 2 = 3 . j 300 . j 1 .
12. q = 1 . j = 60 . .
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13. R = 5 q = 10 . j : 1) ; 2) r = 2 . j = f (r).
14. h = 5 . , , n = 2 .
15. , 3/. , 1.2∙109 ? .
16. . , r 1 = 1 , , r 2 = 4 , a- v 1 = 2 × 105 / v 2 = 3 × 106 /. t .
17. j 0 = 10 . , ?
18. R = 10 q = 5 . j : 1) ;
2) , , , r = 10 . j = f (r).
19. m = 10-29 , , v = 1.6 × 107 /, U = 1 . ?
20. , s 1 = 2 /2 s 2 = - 0,8 /2, d = 0,6 . U .
21. , 600 , , . , 100 .
22. U 1 = 300 , U 2 =100 . . U = 250 . (C 1 / C 2).
23. U = 300 . , (e = 7)
24. 1.5 . , n = 1.5 e = 3?
25. C1 = 3 C2 = 6 e = 120 . Q 1 Q 2 U 1 U 2 , : 1) ; 2) .
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26. U1=500 . S = 200 2. d1 = 1.5 . d2 = 15 . W 1 W 2 , : 1) ; 2) .
27. (e = 7). d = 5 , U = 1 . : 1) E ; 2) s .
28. S = 200 2 d = 3 U = 100 . , d1 = d/3 e = 9. : 1) ; 2) , ; 3) , .
29. t = 1 c , =10 , W = 20 , d = 10 . , , .
30. U1 = 500 . S = 200 2, d = 1,5 . (e = 2). : 1) U 2 ; 2) C1 C 2 .
31. R =20 D t =2 I 0 = 0 I = 6 . Q 1, , Q 2 - , Q 2 / Q 1
32. , R 1, U 1 = 198 , R 2 = 2 R 1 U 2 = 180 . R 1 , R = 900 .
33. , 220 200 . , . ?
34. 12 . , 24 , 6 ?
35. , R = 8 , , R 1 = 800 , , . , .
36. ... ε = 500 l = 2.5 . = 10 . D , d =1.5 .
37. I = kt (t - t), k . R. : ) , t; ) , .
38. l = 500 , I = 20 A.
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39. ... ε = 240 r = 1 R = 23 . 0, ... h .
40. R 1 = 2 , , I 1 = 5 . R 2 = 150 , , U 2 = 12 . .
41. R = 0.5 I = 20 A. , , 0.3 .
42. I = 50 , . () 10 . 0 , .
43. , 5 , I 1 = 5 A I 2 = 10 . , 2 5 .
44. , 300 10 , 5 . .
45. R = 10 , , d = 20 , 0 = 50 .
46. , = 15 , 12 , , . .
47. I = 10 , . R = 10 . . .
48. , 20 , I 1 = I 2 = 10 . , d = 20 .
49. I = 20 , . R = 10 . . .
50. , , d =1 . r = 0.5 . l = 3 , I =20 .
51. , , . 60 , . FA1/ FA2, FA1 - , , FA2 - .
52. l = 20 ( a = 30 ) . I = 50 , m = 1 . , , ? .
53. l = 0.2 m =0.01 , , B = 0.25 . 
, I = 2 ?
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54. d = 10 , I = 5 A, , , , . , , : 1) 120 ; 2) .
55. m = 0.5 l = 0.3 = 400 /. = 0.5 . , 5 .
56. R = 50 I = 1 A. = 0.01 . , . .
57. r = 1.0 × 10-7 × S = 2.0 2, a =30 , , FA =12 . : 1) , , , 220 ; ) , d = 0.6 , b = 60 .
58. l = 0.2 m =0.1 , , . I = 20 , a = 45 . .
59. . l = 50 . a = 30 . , , , I = 40 A? m = 0.6. m = 1 .
60. , d = 10 , I = 100 . . F, l = 1 .
61. , U = 400 , = 1.5 . R n .
62. , v = 107 / c, . , = 0.1 .
63. , v = 106 /, a = 60 . H = 1.5 ×103 /. :
1) ; 2) .
64. v = 106 / c , . = 0.8 , = 600 /. , .
65. U=104 . = 100 /, = 0.1 . q/ m , , , .
66. ( = 10 ) , R = 1 h = 6 . T v.
67. , U =600, , . . = 5 . , .
68. , r0 = 5.29∙10-11 . : 1) ; 2) ; 3) ( ).
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69. 1 = 2 = 20 q 1 =2 q 2 = 3.2∙10-19 , U = 4 , = 0.25 , , . :
1) v 1 / v 2 , ; 2) , , 1 .
70. l = 40 . , , 10 .
71. 0 .5 . 25 2, . , 60 ?
72. 200 2 0.5 20 . . , 400 ?
73. = 0.1 w = 50 -1. l = 0.4 . ... , , .
74. L = 100 D t = 0.5 n = 4 . ... , ( ) I 1 = 10 A.
75. , 30 , m = 5 , , = 0.1 , . v = 50 / c. , .
76. = 5 R =10 ( = 40 ). a = 30 . Q, , .
77. r = 1 , d = 0.5 , , . dB / dt = 0.01 / c. , t = 1 c.
78. , , = 0.1 . a = 30 . , , ... , D t = 10 , 12 .
79. l = 60 , = 4 . Q , ? R = 0.1 .
80. - . . I1 = 0.40 . .
3.
