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, . . , . , ( . 2.1). ( ), .
, , ( . 2.2).
V= IR,
V
( ), / ( )
R
( ). / =
V/R
R
=
V/I.
(I)
, , , , (5 , 13 , 15 . .).
, , . , , , , , . , , , .
. , ,
W= VI
. 2.1. , , , . . , , , , . , . , , , . , .
V
= 240
R
= 60
V
=
IR
/ = V/R
/ = 240/60 = 4
. 2.2. , ( ), , ( ) ( ). V= IR, /= V/R R = V/I.
( . 2.3) , , 60 , 4 240 , 960 ( 1000 , 1 ).
V = 240 I = 4
W = V*I
W = 240*4 =960
. 2.3. (W) . , (V) (/). W = VI, . V- W/I, /= W/V.
, , . , , . 220 110 ( ). . .
1 . , , , . 2 , 1 .
, . , , , .
, ( ), ( ) ( ) , , . 2 . , - .
, , . , , - . , . . . 2.4 , 5- 1 - 5 - .
60
1 / 12
60 5
1 1
5 1/5
12
. 2.4. 12- , 5 , 1 - 12 . , 1 1 , . 5 , (12 ). 5 - , 1 5 , 1 ( 12 ) , .
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Svet na TV(c) osnovy dlja profi
ISBN: N/A
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Pages: 54
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