Question

Answer 1

a. \(R=R1+\left(\dfrac{R2.R3}{R2+R3}\right)=3+\left(\dfrac{7,5.15}{7,5+15}\right)=8\left(\Omega\right)\)

b. \(I=I1=I23=\dfrac{U}{R}=\dfrac{24}{8}=3A\left(R1ntR23\right)\)

\(U23=U2=U3=I23.R23=3\left(\dfrac{7,5.15}{7,5+15}\right)=15V\)(R2//R3)

\(\left\{{}\begin{matrix}I2=U2:R2=15:7,5=2A\\I3=U3:R3=15:15=1A\end{matrix}\right.\)

c. \(U23=U2=U3=15V\)(R1//R2)

 \(U1=U-U23=24-15=9V\left(R1ntR23\right)\)