__________________________
________________________________
______________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
_____________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
_______
|
V |
____________________________________________________________ |
||
2. |
|
|
|
r < R) |
B |
|
|
|
|
|
0 = |
|
0 |
_____________________________ |
= |
|
|
|
_______________________________ |
I |
= |
|
I |
____________________________ |
R = |
|
|
R |
_______________________________ |
Ns = |
|
|
Ns |
______________________________ |
(r/R) |
____________________________________________________________ |
|||
3. |
|
|
|
x < a/2) |
|
I |
= |
I |
____________________________ |
a = |
|
|
a |
_______________________________ |
x |
|
|
|
|
N = |
|
|
N |
______________________________ |
|
r/R |
r/R), |
V = , |
0, |
, |
|
r |
r < R |
B |
r < R |
|||
|
|
|||||
|
|
|
|
|
|
|
0 |
|
|
1 |
|
|
2 |
|
|
3 |
|
|
4 |
1. |
? |
5 |
2. |
|
|
|
|
6 |
6 |
3 |
|
r/R |
r/R), |
V = , |
0, |
, |
|
r |
r < R |
B |
r < R |
|||
|
|
|||||
|
|
|
|
|
7
8
9
10
V = |
, B |
0, |
, |
|
x < a/2 |
||||
|
|
|
0
1
2
3
4
5
6
7
8
9
10
___________________________
__________________________________
4
1.
E(r/R)
E
r/R
E(r/R)
B
r
5