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 |
|
|
_________________________________________________________________________________
g: εg=2εt+εl; Δg=gεg
_______________________________________________________________________________________
: gcΔg≤g≤ gc+Δg.
_________________________________________________________________________________
g .
7. . .
:_________________________________________________________________________
_________________________________________________________________________________
1. .
2. ?
:
. |
. |
1 |
6 |
:
: , .
:
: , , .
, .