e r Δ r r : 
, Δr=r∙εr.
Δ 
, Δ U ΔI, .
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
1.
:Ɛ= ƐΔ Ɛ; r=r Δrmax, Δrmax r.
Ɛ= ; r= ; εr= %.
5. . .
:_______________________________________________________________________
____________________________________________________________________________________________________________________________________________________________
1. ?
2. ?
:
| . |
| . |
| 1 |
| 5 |
:
: ;
:
: , , , .
, .
:
1. 0,2 . ?
. 0,2; . 0,4; . 0,8; . 2,5.
2. , , 30 . ?
. 0,5; . 15; . 60; . 0,25.
3. , 40. ?
. 5; . 10; . 20; . 40.
4. 10 10 20?
. 2 ; . 2 ; . 
; . .
5. 2 2 ?
|
|
|
. 
; . 
; . 4 ; . .
:
| 1 | 2 | 3 | 4 | 5 |
. .
: 
(1), 
(2); π=3,14; l , g . (, N=30, 40, 50).
g. (2) (1) g:
→ 
→ 
→ 
→ 
(3).
l, t N.
3.
1. . t N.
2. l g (3):
| . |
| . |
| 2 |
| 5 |
1 g 1 = ___________________=_________;
2 g 2 = ___________________=_________;
3 g 3 = ___________________=__________.
3. 1.
1
| N | t, | t, | l, | g, 
| g, 
| εg | Δg, 
| |
| 1 |
|
|
|
| ||||
| 2 | ||||||||
| 3 |
4. .1-2.
2:
l = ____________;
4g 4 = ___________________=_________;
5g 5 = ___________________=_________;
6g 6 = ___________________=__________.
5. 2.
2
| N | t, | l, | g,
| |
| 4 |
| |||
| 5 | ||||
| 6 |
6. , 1.
:
, 
, 
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
: 
,
g = ___________________=_________;
| . |
| . |
| 3 |
| 5 |
, Δ l =0,7510-2;|
|
|
_________________________________________________________________________________
g: εg=2εt+εl; Δg=gεg
_______________________________________________________________________________________
: gcΔg≤g≤ gc+Δg.
_________________________________________________________________________________
g .
7. . .
:_________________________________________________________________________
_________________________________________________________________________________
1. .
2. ?
:
| . |
| . |
| 1 |
| 6 |
:
: , .
:
: , , .
, .
