, . : . , , , , , .
. , , . , . : . , . 2, 3 , ? . , . - , , .
. - , , . ... -, , , . , : .
, , , , . , , .
, . , . , . ? . . , : .
. , , . , . : , .
, - , . : . :
I =U/R.
I - . .
U - . .
R - . .
- , W. : W = U*I. .
, . :
, . | I = U/R | I = 220 / 500 = 0.44 . |
, . | W = U*I | W = 220 * 0.44 = 96.8 . |
, . | R = U/I | R = 220 / 0.44 = 500 . |
, . | U = I*R | U = 0.44 * 500 = 220 . |
, . | W = I2*R | W = 0.44 * 0.44 * 500 = 96.8 . |
, . | W = U2/R | W = 220 * 220 / 500 = 96.8 . |
, . | I = W/U | I = 96.8 / 220 = 0,44 . |
, . | U = W/I | U = 96.8 / 0.44 = 220 . |
, . | R = U2/W | R = 220 * 220 / 96.8 = 500 . |
, . | R = W/I2 | R = 96.8 / (0,44 * 0,44 ) = 500 . |
, . "" . , , : ---... - 100 .
|
|
, , 50 ! , . , . , , ( ), .
, : , ?
. . , 220 , . .
: . : I = W/U. , 220 , 220 , . , .
, . , . - , 50 .