2
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1921 .
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- 2003 -
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, .
U I (. 1).
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, .
( ).
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, . : I1= I1|- I1||; I2= I2|- I2||; I3= I3|+ I3||; I4= I4|+ I4||.
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U0, , ( ).
, . R3 , R0 , Ik .
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, , , .
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, . . () () (). . S1 S2.
. , 4 . . 2 . . ( ) .
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U, B | U1, B | U2, B | U3, B | U4, B | I, mA | I1, mA | I2, mA | I3, mA | I4, mA |
3.95 | 0.74 | 0.96 | 3.21 | 4.17 | 1.53 | 1.98 | 0.60 | 2.58 | 0.94 |
: | ||||
I4-I+I2=0: | I=I4+I2I=0.94+06=1.533 mA | |||
I3-I2-I1=0: | 2.58-0.6-1.98=0 mA | |||
I2+I4-I=0: | 0.6+0.94-1.53=0 mA | |||
U2+U3-U4=0: | 0.96+3.21-4.17=0 mA | |||
U1+U3-U=0: | 0.74+3.21-3.95=0 mA | |||
U1-U-U2+U4=0: | 0.74-3.95-0.96+4.17=0 mA |
: , .
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: | I1, | I2, | I3, | I4, |
U | 2.87 | 0.49 | 2.31 | 0.484 |
I | 0.89 | 1.09 | 0.27 | 0.46 |
U, I | 1.98 | 0.6 | 2.58 | 0.944 |
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(U=3,95 ) (. ). . .
R1 | R2 | R3 | R4 | U | I |
0.37 | 1.61 | 1.24 | 4.46 | 3.95 | 1.53 |
| 1.0324 | |||||||||||||||||||
R13=R1*R3/R1+R3= | 0.29 | |
R123=R13+R2= | 1.89 | |
I''4=I*R123/R4+R123= | 0.46 | |
I''2=I-I''4= | 1.07 | |
I''2=I*R4/R4+R123= | 1.07 | |
I''3=I2*R1/R1+R3= | 0.25 | |
I''1=I2*R3/R1+R3= | 0.83 |
: .
R3 .
, 3 (UAB). , () UAB=U0 . I3. , .
:
1) UAB =4,12 .
2) I3 = 2,58 mA.
I3: | |||||
I1=(U-I*R4)/(R1+R2+R4)= 3.95-(1.53*4.46)/0.37+1.644+4.46=-0.446 | |||||
UAB=U-I1*R1 = 3.95-(-0.45*0.37) =4.11664 | |||||
R=R1(R2+R4)/(R1+R2+R4)=0.35171 | |||||
I3=UAB/(R3+R)=2.5791 | |||||
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