2 . , .. (U2 1 ). R1 . R. .

2.

(3)

UA = UB = 0         (5)

, , . .

, , (4)

;         (6)

.         (7)

, = U / U,,

,         (8)

1800 ( , , ). , , , , . , .

(8) , , .

(. (1)) . , , , . , , R1, ..

R = R1.         (9)

, . - , .

 

3. -

/ .

, :

.         (10)


, ?
( , - , , , , ( ) . , .
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