, . .4.1.
T , , .
, , ; , , . , ; , .
.4.1. ,
. . () , . = - d/dt = - d/dt .
, , , , . .
S , , - . - = . ,
. , . ; , , . [ ] [ B∙c ].
, :
= - ; = - . (4.1)
:
- = = - d/dt; - = = - d/dt. (4.2)
, , :
; ; . (4.3)
(4.3) (4.2), :
- d /dt = ω , = ω , = ω .
ω=2πf ,
=4,44 f , =4,44 f , (4.4)
f - .
=4,44 f , =4,44 f . (4.5)
|
|
(4.5)
. (4.6)
, >1, , <1, , =1, .
, , I I , .
4.2. .