1. 25 10 1 . , 5 ?
2. , amax = 49.3 /2, =2 0=25 .
3. j 0 = 0. 1 = 2.4 v 1 = 3 /, 2 = 2.8 v 2 = 2 /. .
4. , l = 0,5 m = 50 x 0 = 5 . : 1) ; 2) .
5. m l. , x. I = ml2/12.
6. 10 /, 1 . , 5 , 60 .
7. 0.01 0.03 10 -1. . : ) ; ) , 0.02 .
8. , , 410-2 , 0.05 / 0.8 /2. : ) , ; ) ; ) .
9. = 2 , = 0.30 . F = 22.5 ?
10. , , , : 1 = /2, 2 = /4, 3 = . j = 0. ( ).
11. 30 10 2 0.1 . , , 750 .
12. : 
. 10 . , 10 .
13. I (t) = 0,02sin(400 p t), A. 1 . : 1) ; 2) ; 3) ; 4) ; 5) .
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14. q = Acos (p t), = 2 . , . 0.05 .
15. 200 2 . , 0.5 ? ?
16. q = Acos (p t), = 2 . , . 0.05 .
17. q = qmaxcos (w t), qmax = 5 , w = 108 / c. t 1 = T /8 (T ).
18. l , , 12 . , qm , Im = 1 .
19. , 2 × 10-7 , . , , 2 × 10-8 1. , .
20. , 2.0 , 1000 ?
21. : x 1 = A 1 cos (w t + j 1), x 2 = A 2 cos (w t + j 2), 1=1 , j 1 = p /3 ; 2=2 , j 2 = 5 p /6 . j . .
22. , x = A 1 cos (w t), y = A 2 cos (w t /2), A 1 = 1 , A2 = 2 , w = p, / c. . .
23. , 1 = 2 2 = 2.02 . .
24. : 1 = 2 = 1.5 1 =2 = 2 . j 1 = p /2 j 2 = p /3 . j . .
25. , : x = A 1 sin w t, y = A 2 cos (w t + t), A 1 = 2 , A 2 =1 , w = p -1, t = 0.5 . y = y (x) , .
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26. , 1=0.02, = 0.2 . .
27. : x 1 = A 1 cos (w t + j 1), x 2 = A 2 cos (w t + j 2), 1=2 , j 1 = p /4 , 2=1 , j 2 = 3 p /5 . j . .
28. , , j = 60 , = 6 . 2 , 1 = 5 .
29. , : x = 2 cos (w t), y = - cos (2 w t). y = y (x) , .
30. 1 = 2 = 3 A 1 = A 2 = A 3 = 3 . j 1 = 0, j 2 = p /3, j 3 = p /3, . , . .
31. , t = 1 2 . ( l = 1 ).
32. 0.01 , 4 2 . . . 400 .
33. 
.
: ) t = 0; ) , .
34. , 100 50 , . , , , ? .
35. 1 3 . , 4 .
36. n 0 = 8 , Q = 72. . W , , 50 .
37. m = 100 , , 2 60% . .
38. L=10 , =0.1 R=20 . , e .
39. l = 0.01. 3 .
40. n 0 = 8,0 ; Q =72. . W t. W 0 t =1.00 ?
41. 30 10 2 0.1. , , 750 .
42. r = 1 /. , , = 0.5 , n 0 = 10 .
43. U = 220 B , R L. U R , , U C = 2 UR, UL = 3 UR.
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44. , ? 0.1 w 0 (w 0 ).
45. R=10 L U = 7 B n =50 . L , , P = 400 j =600.
46. n =1000 . n0, , 998 .
47. Q, , , , , 1 %?
48. , , 5 , 5 . , 1 . , 220 .
49. = 0.2 , 13. .
50. n 1 =400 n 2 =600 . n. .
51. 150 /. n , D x , , 0.75 .
52. 
, a, b, w k . , h = 1 %, b = 0.42 -1 l = 50 .
53. , 0x , , v = 15 /. , x1 = 5 x2 = 5,5 , D j = p /5. A = 0,04 . : 1) l, 2) , 3) s1 t1 = 3 .
54. , l = 4 , t = T /6 ( ) . .
55. v =15 /. = 1.2 , A =2 . : 1) ; 2) , , , = 45 t =4 ; 3) , x 1 = 20 x 2 = 30 .
56. l =4 v = 440 . , , . 440 /.
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57. 
, x , t - , - . : ) ; ) .
58. t = 20 N 1 = 30 , l = 20 , N 2 = 10 . .
59. , l = l /2, t = T /6 ( ). = 0.05 .
60. , l = 4 , t = T /6 . .
61. 40 , , l = 550 . , , , . , . 1500 /, 340 /.
62. l , n = 250 , 1450 .
63. 6/, 45 . n 1 n 2 ? 340 /.
64. n 1 = 20 n 2 = 20 . ?
65. , 461 /c, .
66. V 1 = 72 / V 2 = 54 /. n = 600 . , . V = 340 /.
67. 80 , 40 . .
68. , 450 , 36.9 . .
69. , . , V = 60 / ?
70. , , = 1.01∙105 r = 1.29 /3.
71. , 36 . , 81, .
72. , , : E = 200 cos (2 × 108 t 1.3), /. .
73. , S = 10 2 τ = 5.0 , p = 10-2 /. I .
74. ν = 3.0 ε = 4.0. .
75. ε =4 μ =1 Em =200 /. : ) Bm; ) v; ) - Sm.
76. v , ε =4.5. .
77. (μ =4,0) : Em = 5,0 ∙ 10-5 /; λ =100 ; ν =1 . W τ =10 S =1.0 2, ?
78. , 0 = 0.05 /. : ) ; ) ; ) .
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79. 5 t = T /6 . , .
80. . , 5 /.
4.
