3.
1. σ =2,8ּ10-6 /2 8 .
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2. , . 2, . 1, 2 3, ?
3. , . ε =2,5. ?
4. 1,4 2 1 . ρ=28 ∙.
5. 1=2 2=1,5 r1=0,5 r2=0,4 R=2 (. 1). .
6. , s=10 , I1=20 I2=30 (. 2). , I2 d=3 .
7. , L=25 i=(3+4t)ּ10-1 .
8. ν =4 ε =3 . .
9. (ε =3) =1 / . σ .
10. R=4 , σ =1 /2. (φ1-φ2) , r1=6 r2=10 .
11. +q S (. 2). +q , ?
12. R 2R q1=1 q2=2 . 3R φ =9000 . R.
13. C 1= C 2= 5 80 . Q, W , , d = 2 . (Q1 = 2×10-4 , W1 = W2 = 4 , = 20 /)
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14. R = 5 . d = 2 . U = 60 . Q, W . (Q = 2 , = 30 /, W = 60 )
15. U = 600B. S = 100 2, d 1= 1,5 . 3 , . ? (W1 = 10,6 , W2 = 21,2 , 1 = 2)
16. , d = 3 , , B = 6,3 , . (I = 15A).
17. I 1 = 10 A I 2 = 2 I 1 . r = 10 . , r 1 = r 2 = r I 1 I 2. ( = 27,6 /, = 34,6 )
18. r 1 = 2 r 2 = 20 . I 1 = I 2 . = 275 /. . (I 1 = I 2 = 10 A, B = 345 )
19. , d = 5 , . , I = 50 . ( = 10 /, = 12,56 )
20. ℓ = 5 d = 10 . I 1 = I 2 = 30 . F . (F = 9 )
21. I 1 = 5 A I 2 = 3 A . , , d = 5 . (F = 0).
22. = 0,02 . (w = 3,7×109 /)
23. , B = 30 , L = 10×1,25-25 ×2/. . (R = 0,5 ; w = 5,27×109 -1).
24. = 0,5 . N t = 1 c? (N = 14×109 )
25. a - . , , . (Ra/Rp = 2)
26. = 0,6 0,4 300 , U = 0,6B. . (v = 5/)
27. <| ℰ u,|> 0,8 , 800 2 , 12,6 . . ( D I D/ t = 40 /)
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28. R = 20 r = 2 , . , , 2 0 10 . (|ℰ| = 0,2 )
29. = 2 . = 1 . L (L = 13 )
30. , , 8 ? (2/1 = 3)
31. 
, . 0,1 . . (
, = 10 )
32. 100 . 5 , 20 . .
. :. : . : . .
) 4. _
1. . . ( = 780 ) ?
2. , n = 600 , . , . (l) , L = 1,2 . λ = 780 , λ = 400 .
3.. 0,6 , . . .
4. (λ= 600 ). , , φ=2 0. () .
5. , φ= 4 0. , (k) 0,15, , , , , .
6. i 1 = 60. . (i2) .
7. φ = 50. , , n = 4 . , (k) .
8. , , . (i1) ?
9. P e = 4/. (T) , S = 8 2.
10. e = 10 , λ m = 0,8 . (S) .
11. (. 3) n l. ? , ?
12. . d 280 . φ = 65 . (λ) .
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13. , (λ m1 = 780 ) λ =160 . λ 0 = 310. (ma x ) -, λ = 200 .
14. λ= 150 . (ma x ) .
15. E = 10 . (), , , , .
16. λ = 200 . (Umin), , .
17. γ-, , V max = 3 /c?
18. (λ = 0,25 ). Umin = 0,96 . () .
19. λ 1 = 15 . λ 2 = 16 . (φ) .
20. (r2) (V2) .
21. (T) , , n = 2.
22. (Emax) .
23. (E1) (Ei) , .
24. (E), .
25. (Emax) (Emin) ( ).
26. . (λ) , .
27. . (), () () . .
28. , , . (p) ?
29. λ= 800 . τ = 10 . (Δλ), .
30. , (I) , Emin = 10 .
31. - , , . , , (l), , Emin = 8 .
32. , , l. 0 < < l ? . .
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33. , , l = 0,1 . - .
():
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| (, , ) | () | (...) | ||
| __ ________ 201_ . |
