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.
. . .
2007 .
,
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2. 3.
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4. 5.
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………………………………………. ………………………………………. ………………………………………. : : : : : : :
: : : : :
2007 .
3
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3(
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01 02 03 04 05 06 07 08 09 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
11 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 15 16 17 18 19 20 11 12 13 14 29 30 21 22 23 24 25 26 27 28
4
http://www.physics.spbstu.ru
1.
.
.
1-1
1
1-2
, –1
1
20
.
. 10
. ,
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1-3 10 , 1-4 10, 20
. 100 10
–30
.
, 10
.
1-5 10 10 .
,
1-6
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–q,
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10 1
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20
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2
2
10
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.
1-11 1
5 .
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1 5
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,
3,34
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0,5; 1 , .
1-13 ,
.
10
.
1-14 .
1,33 . 300
10 , 15 .
1-15
10 300
15 ,
. ?
1-16 9
, 2
10
1
,
.
1-17 0,5
. 0,2
2
.
–0,3
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2
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0,5
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1-19
5
8 .
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50
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20 ,
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.
1-21 ,
R = 10 d=1
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2
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R >> d.
1-22 2
0,5
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1
.
1-23
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.
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1-24 .
12
1-25
1
24 . 10
6,67
. .
1 ? 1-26
, 133
-
,
. 6,7 ?
1-27
, 300
,
10
. 5
,
20 L
1-28 5
. 1
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,
.
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, 3
.
10 , 15
7
.
,
2.
.
2-1 D. ? 2-2 100 ,
2.
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2.
. 2-3 100 . 2-4
10 280
,
,
( = 7)
3
.
. ( = 7)
2-5 .
30°. , 2-6
?
( = 7) . 30°. .
2-7
( = 7) 10
. 30°. .
2-8
( = 7) . 30°. .
2-9
( = 7) 10
. 30°. .
2-10
1 314
( . 8
= 2)
http://www.physics.spbstu.ru
5 2-11
1 314
. (
= 2)
. 5
. ( = 2)
2-12 .
, . ?
2-13
= 5 100 . .
2-14
( = 81)
100 ,
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N. .
2-15 . . 2-16
q R.
1
2.
.
2-17
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.
, . ? 2-18
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1
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2
2-19 ,
.
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= 7. ( = 2) . ,
,
2-20 ( = 7) ,
0,2
, 400 .
2-21
( = 5) 40°
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2-22
(
1
60°
= 81)
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2-23
( = 2) 10
3
2
= 7.
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2-24
( = 2) 10 .
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3 5
2-25 =7
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r1=7 q2 = 3
.
2-26
q1
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1
.
2
r2=5 q1 = 5
q2.
=2 ±3
2
= 5. ,
.
2-27
( 100
1
= 81) 60°
. ,
2=
2-28 ,
–1
7. 5
. ,
7.
. ( = 5)
2-29 200 2-30
40° .
.
( = 5) 200
40°
. .
10
http://www.physics.spbstu.ru
3.
.
3-1 . ,
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3-2
12 ,
2
2
.
, .
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,
1
2
2
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3-4 1
10
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25
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. .
3-6
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3-7 2. 100 – 200 , ,
3-8
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2
4
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220
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3-9 100 ,
0,5 (
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3-10 25 ,
5 11
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200
2
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,
– 6 400
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3-12
2.
, 400 .
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2
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0,8
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1,5
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,
3-13 . , ? 3-14
2
200
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2 ,
0,7
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7. . 3-15 200 .
0,1
3-16 0,36 0,2 0,3 3-17 . 3-18 200
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– 0,3 . .
.
. , 40000 ,
2
,
1
.
=2 2 = 4. – 0,885 .
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10
.
,
( = 81) ?
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–
2 ,
12
.
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? 3-21
5
2 8
–
1
;
.
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1
. 1
0,2
.
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3-23 20
.
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16
.
3-24
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500
50
,
300 .
3-25
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45
50 . 3-26
5 :
2 3
5
,
,
,
. .
3-27
5 :
5 3
2
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. .
3-28 200
400
600
.
. 3-29 300, 400
600
600
.
. 3-30 0,6
,
0,4
, 5 .
.
13
