, , . 5.1, 1 r; 2 ; 3 r; 4 (); 5 ; R .
. 5.1
䒺 -2. 3..9 ».
- 2. , R >>100 .
R , 䒺 , U (r) A . , R, , :
I (r) = U (r)/R,
r .
I (r), , :
U (r) = I (r)R. (5.6)
I (r) , , . ϳ :
<I (r)> = 1/n * ∑ Ii (r). (5.7)
:
U (r) = <I (r)> R.
r 1 ( ) 8 ( ) Δr = 1 . R .
U (r), r. E (r) U (r):
E (r) = (U (r) U (r + Δr))/ Δr.
U (r) , Δr=0.01 . , U (r). . r= 1.5; 2.5;; 7.5 :
E (r +0.5 c) = (U (r) U (r + 1 ))/0.01 (5.8)
(/), U (r) .
. 5.2
1. , .
2. ϳ . , 3 9 » , 䒺 3 9 », .
3. ܻ .
4. 3 9 » , ( , ). , , 0. , U0 = I0R.
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5. (). 1, 2, 3,, 8 (. 5.2) I1 (r) .. 5.1.
. ϳ , . , . , .
6. , .5 2, 3, 4- . I2 (r), I3 (r), I4 (r), .. 5.1.
7. . . 3 9 » .
8. , , r r ; . R, .