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, ' 1 1 ,
$&
2400
0
, $& :
& , +
/
181,2 !
, I
/
1422 0
" , U
/
0,127 !
&, I
/
0,364 0
,
µ′
1,37·10
-9
/
3
" , & , $&
" , $ .,
. '.
+
= +
/
ld = 181,2
⋅
10
⋅
0,01 = 18,12 !;
I
= I
/
ld = 0,364
⋅
10
⋅
0,01 = 36,4 0;
µ
=
µ
/
ld = 1,37
⋅
10
-9
⋅
10
⋅
0,01 = 1,37
⋅
10
-10
/ ;
τ
≈
3000 .
2. !. 5 0,16
& 15 0. ?
+* * - +
":
F =
π
dl = 3,14
⋅
0,016
⋅
5 = 0,25
2
.
I
= FA
⋅
T
2
KT
W
S
e
−
,
0 = 60 0
⋅
-2
⋅
-2
W
S
= 4,52 !.
0,015 = 0,25
⋅
60
2
e
-(4,52⋅11600)/
,
.:
ln 0,015 = ln 15 + 2lnT – 52406/T;
52406 / = 2lnT + 6,91;
= 52406/ (2ln T + 6,91).
, ' 1 1 , $& 2400 0 , $& : & , +/ 181,2 ! , I/ 1422 0 " , U/ 0,127 ! / & ,I 0,364 0 , µ′ 1,37·10-9 / 3 " , & , $& " , $ . , . ' . + = + /ld = 181,2⋅10⋅0,01 = 18,12 ! ; / I =I ld = 0,364⋅10⋅0,01 = 36,4 0; µ = µ/ld = 1,37⋅10-9⋅10⋅0,01 = 1,37⋅10-10 / ; τ ≈ 3000 . 2. ! . 5 0,16 & 15 0. ? + * * - + " : 2 F = πdl = 3,14⋅0,016⋅5 = 0,25 . WS − 2 I = FA⋅T e KT , -2 -2 0 = 60 0⋅ ⋅ WS = 4,52 !. 0,015 = 0,25⋅60 2e-(4,52⋅11600)/ , . : ln 0,015 = ln 15 + 2lnT – 52406/T; 52406 / = 2lnT + 6,91; = 52406/ (2ln T + 6,91). 9
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