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(. 4.6.4) : q1 = q2 = q, , q U = U1 + U2. ,
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. , .
;
( I), (q), (t) , .
I=q/t
(). - 1 - , , , 1 2 ∙ 10-7 , .( ?)
, .
I = e n v S,
e = -1.6 ∙ 10-19 - ,
n = N / V - ,
N - , t,
V - ,
v = l / t - ,
l - ,
S - .
j I S, , ,
j = I / S.
- . .
- ( / 2).
/ 2: 1 / 2 - 1 , 1 2, , .
:
j = e n v.
;
:
:
I = U / R.
R = U / I