; . , .
, .2.4,
.2.4.
;
;
R, R
;
R ;
R ;
R, R
;
U, ;
U ;
I, I .
, , . , .
, (3 5% ), .
(.1.4) :
U = + I R, (2.6)
U = I R, (2.7)
R = R + R+ R + R ;
R = R+ R .
= ( N / 2 p ) w = w, (2.8)
N, ;
, ;
= N / 2 p .
n[/],
w = 2 p n / 6. (2.9)
(2.6) :
w = U / R I /. (2.10)
,
= I. (2.11)
(2.10) (2.11) :
w = U / R / ()2. (2.12)
(2.10) (2.12) () () .2.5.
) )
. 2.5.