= 0;
I = 0
, w 0 . (2.10) (2.12) :
w0 = U / . (2.13)
w = 0 , (I) () . w = 0 :
I = U / R; (2.14)
= U / R. (2.15)
(2.14) (2.15) , , , R.
(2.10) (2.12) , - , . . .
, , , . , , , -.
: , ,
b = D / Dw.
D = 0;
Dw = 0 - w0,
b = - / w0. (2.16)
(2.16) w 0 (2.13) (2.15) :
b = - ()2 / R, (2.17)
.
Dw = , , , :
Dw = w 0 - w = R / ()2. (2.18)
l, :
l = / . (2.19)
( ) .