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fistashka123
@fistashka123
July 2022
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Решите, пожалуйста, 2 и 4
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solvo
2.
R1=12 Ом, R2=6 Ом,R3=3 Ом, U3=15 В.
I-? U1-? U2-? U-?
I=I1=I2=I3=U3/R3=15/3=5 A.
U1=IR1=5*12=60 В.
U2=IR2=5*6=30 В.
U=U1+U2+U3=60+30+15=105 В.
4.
R2=9 Ом, R=3 Ом.
R1-?
1/R=1/R1+1/R2, 1/R1=1/R-1/R2, 1/R1=(R2-R)/(RR2), R1=RR2/(R2-R), R1=27/6=4,5 Ом.
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Answers & Comments
R1=12 Ом, R2=6 Ом,R3=3 Ом, U3=15 В.
I-? U1-? U2-? U-?
I=I1=I2=I3=U3/R3=15/3=5 A.
U1=IR1=5*12=60 В.
U2=IR2=5*6=30 В.
U=U1+U2+U3=60+30+15=105 В.
4.
R2=9 Ом, R=3 Ом.
R1-?
1/R=1/R1+1/R2, 1/R1=1/R-1/R2, 1/R1=(R2-R)/(RR2), R1=RR2/(R2-R), R1=27/6=4,5 Ом.