: ..
..
2004 ., . 167
020818 13.01.99. 09.02.04
6084 1/16. . . .-.. 0,5. 50 .
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344022, --, ., 162.
, 2004
34
: .
: 1. . 2. . 3. . 4. . 5. . 6. . 7. .
1.
, (), ABCD (), () (e), ().
, BD .
(Rx, Rm, r1, r2) , . Rx, Rm, r1, r2, , . BD . AB, BC AD, DC I1 I2 (. ). D D, :
I1 Rx I2 r1 = 0 Þ I1 Rx = I2 r1;
I1 Rm I2 r2 = 0 Þ I1 Rm = I2 r2.
Rx: Rx = Rmr1/r2 (1)
II.
1. , , .
2. , (r1/r2) 1.
3. ( ) . (Rm), , . . Rx (1).
4. (r1/r2). .
| r1, | r2, | Rm, | Rx, | <R>, | |
|
|
|
5. Rx.
6. DRx , :
DRx = (Rx max - Rx min)/2
7. dRx:
dRx = DRx/<R>.
8. :
Rx = <R> DRx.
III.
1.
2. Rx.
3. , ?
4. ?
5. , .
| , | |
| , ? | |
| , .. . | |
| , .. | |
| , .. | |
| , .. | |
| ? | |
| U = I R | |
| R = R0(1+at) | |
| I = U/R | |
| R = rl/S | |
| ? | |
| I = U/R | |
| U = IR | |
| R = R1 + R2 + R3 +...+ Rn | |
| I = e/(R + r) | |
| , | |
| A = IUt | |
| A = I2Rt | |
| A = U2t/R | |
| A = QU | |
| ? | |
| , | |
| , | |
| , | |
| , | |
| ? | |
| , | |
| , | |
| , | |
| , |
|
|
|
