. . 2.
, (15)
- , ;
- , ;
Wz - , 3;
- , .
3 = 120 .
= R1 l1, (16)
R1 l1 - 3.2.
2 -
R1
R1 + R2 = Q (17)
R1 l1 = R2 l2
,
R1 = Q l1/ (l1 + l2) (18)
l1 = l2. R1.
.
Wz = , (19)
h, h1, , 1 - 3.
3 -
h, h1, , 1.
(19), .
, (15).