2
. , .
.1. t1 t2 , .
t1 , 1. 1 (E = const). E 1 r1 r2. U1, t1 R1, 1.
t2 , 2. 2 (I = const). U2, t2 R1, 2.
U1 U2 U1U2, t1t2.
. - , -, -.
t1 (60150)ºC, t2 (3070)ºC, t1t2 = (20100)ºC.
U1U2 M1 M2 (.1).
1.
: t1 t2, R01,R02 . , I .
:
1. U1.
1
,
α = 4,26 10 - 3 1/ºC = 0,00426 1/ºC.
U1 (7) .
R1 , R2, R3, R4 R01.
E :
E = 2 I R01.
2. U2
2
,
α = 3,94 10 - 3 1/ºC = 0,00394 1/ºC,
β = 5,8 10 - 7 1/ºC = 0,00000058 1/ºC.
U2 (16) .
R1 , R2, R3, R4 R02.
3. U1 U2
4. U1 U2 r1 r2 1,
r1 + r2 = 5 .
.1. .
1
M1(R1-) | M2(R1-) | |||||
t 1, º C | R 01, | I , | t 2, º C | R 02, | I , | |
|
|
.
1. 1 (.1) (E = const).
r1 r2 1, U1 ( )
U1 = U = U U (1)
I1, I2,
U = I1 R1 (2) U = I2 R4 (3)
(2) (3) (1),
U1 = I1 R1 I2 R4 (4)
|
|
I1 I2
(5) (6)
(5) (6) (4),
(7)
2. 2 (.1) (I = const), I1 I2
U2 = I1 R1 I2 R4 (8)
Uab, ab
(9) (10)
2 (I = const),
Uab = I Rab (11),
(12).
(13)
(14) (15)
(16)