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, , . , . , t . : i = I(I), u = u(t), e = e(t). m, 1 Um, (. 4.1,).

, . .

(. 4.1,), . . . ω = a/t .

α= 0 ( 0-0΄), ,

, (3.23), = -d/dt =. α = 90 , , , ,

= :

NS ,

:

= sin α = sin ωt (4.1)

R, , : i = e/R = (Em/R) sin ωt = Im sin ωt.

(. 4.1,), () , .

:

 

f=1/T. ().

 

, , . 50 , 60 . , , 3005000 . .

, (. 4.1), . . f = n, , -1,

, . . f = 2n, f = pn, . -1,

f = pn/60. (4.2)

α =2π, ω = α/t = 2π/, . .

ω = 2πf. (4.3)

ω . 2π .

, , . , . . I , U , . , , , , , .

, , , (1).

Θ = I2Rt, . . I2 T (. 4.3),

i2(t). , ( , i I) I2 = I2m /2, . ,

I = I / √2=0,7I. (4.4)

, .

I , .

I=2 I/π = 0,637I.

(4.1) , t = 0 00' (. . 4.1),

e(0) = Em sin 0= 0. , ψ , (0)= sin(0ψ) = sinψ ψ, () .

, :

= sin α = sin (ωt + ψ)),

α = (ωt+ ψ) , .

. .

(. 4.4,). φ, e ( α1 = 90) , 2. e1(t) e 2 (t) α 1 α2. , , , . φ= α1 α2 = (ωt+ψ1)(ωt + ψ2) = ψ1 ψ2, . . . , (.4.4,) .

. m (. 4.5) α , .

= Em sin α .

α , ω.

. , , (4.4), √2 , .

(. 4.6), . ( ) , (2).

, .

, , . , . 4.6 1. , , (. 4.7,), (. 4.7, ) 180. 90, (. 4.7, ) .

. .

(. 4.8, ),

= Em1 + 2 = 7 ,

(. 4.8, ), Em = Em1 Em2= 1 .

 

90 (. 4.8, ),

= √E2m1+E2 m2=5 .

: 1) (

); 2) ; 3) ; 4) ( ).

 

 





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