.


:




:

































 

 

 

 


. . .




(U = A / q) = Uq, q = It, :

= Ult,

= I 2 Rt = U 2 / R t.

, , N = A / t, , N = UI = I 2 R = U 2 / R.

X. , . , , , , .

Q =I 2 Rt.

, (. 18). , , , .

, , , , ( ) . , . , . ξ= A/q

t q. : A = ξ q. q = It, A = ξ It. , R , .

:

Q =I2Rt + I 2 rt.

= Q. ,

ξ= IR +Ir. . , . :

I =

. , . . , , .


17





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