U, I R .
I = U / R, U = I×R, R = U / I,
: I - , ;
U - , ;
R - , .
.
, .
1
I = f(U) R=Const I=f(R) U = Const.
I = f(U), (. 1.1) , , . 1.1. .
. 1.1
1.1
U, | |||||||
I, R=100 | |||||||
I, R=150 | |||||||
I, R=330 |
. 1.1.
. 1.1 (. 1.2) U= f (I) .
I = f (R) , 4 , 8 12 , , .1.2
1.2
R, | |||||||
I, U=12 | |||||||
I, U=8 | |||||||
I, U=4 |
. 1.2 (. 1.3) I = f (R).
. 1.2 I= f (U)
. 1.3 I= f (R)
____________________________________
:
1. ?
2. ?
3. ?
4. ?
5. ?
6. .
7. ?
, .
( ) , ,
P = U ×I = U2 / R = I2 ×R, .
, .
|
|
DR = R ×a ×DJ,
R - 20,
a - ,
DJ - .
, . .
.
, , .. I =f(U) .
2
I = f(U) .