. RC .
. , PQ , ( -08), (R1), (R2), (), .
, , R ε (. 1). . , , . :
, (1)
q > 0. , ( ) (1) :
. (2)
( t = 0, q = 0):
,
, (3)
qm = εC.
:
:
, (4)
. q(t) J(t) . 2.
, R. dq dt. (. 3) . , q = CU,
U () . JR = φ+ - φ- = U = q/C,
. (5)
(5) , t = 0 q = q0, :
; , (6)
. (7)
q(t) . 4. (7):
(8)
RC = τ . τ e . RC , , t1/2. :
(9)
(9), t1/2 = RC ln2 = RC 0,693
R = 1,4425 t1/2. (10)
t1/2 1,44. , ( ) . 2 , . t1/2 = 0,693 RC 2 (. 5).
R (. 6), - , . 7. - , Y .
|
|