1. 3.
3.1.
,
.
3.2.
10
6
(
.
1012
)
(
)
.
, 1
0,1
B
, 0,1
.
I2
I1
X
R
A
.
G
C
r1
r2
I3
I4
D
.
E
R,X,r1,r2
(3.1
E . . .
.
4.1-
G
)
,
.
.
.
19

2. .
. B
D
.
V AB =V AD
V BC =VDC
.
I 1 X=I 3 r 1
I 2 R=I 4 r 2
,
B
I 1 =I 2
X r1
=
R r2
X =R
r1
r2
D
I 3 =I 4
(3.1)
.
. (3.1)
r1
r2
X
.
.
r1
=
r2
.
l1
S = l1
l2 l2
ρ
S
ρ
(3.1)
:
l
X =R 1.
l2
(3.2)
.
r1
r2
.
r1
(3.2)
r2
X
l1 l 2
.
R
X
20
,
.

3. .
l1 l 2
(3.2)
R
.
X
.
.
.
.
3. .
3.2
.
3.1
.
.
B
k2
X
R
, l1
r2
l1
l2
.
G
A
r1
l2
D
C
T
.
k1
E
.
3.2-
.
.
k1
k2
.
21

4. .
.
. . .
,
. k1
, k2
.
.
.
R
.
3.4.
. 3.2
1.
R
X
.
.
.
.
.
2.
.
l1,l2
X
(3.2)
R
.
±10%
3.
X
.
.
.
.
,
22

5. .
.
.
4.
.
.
3.5.
♦
R
E
.
3.6.
?
1.
2.
3.
4.
5.
.
?
.
?
6.
7.
8.
9.
?
?
.
?
10.
?
11.
?
•
•
•
•
1. . .
.
.197 .
.
2. . .
.
.
2.
. 1988.
. R.A.Serway. Physics: For scientists and engineers. Saunders
golden sunburst series. 1982.
4. . .
.
. . 198 .
23