Question

Answer 1

10. R1 nt ( R2//R3)

a,\(\Rightarrow U23=U2=U3=I1.R23=0,4.\left(\dfrac{R2R3}{R2+R3}\right)=2,4V\)

\(\Rightarrow\left\{{}\begin{matrix}I2=\dfrac{U2}{R2}=0,3A\\I3=I1-I2=0,1A\end{matrix}\right.\)

b,\(\Rightarrow Uac=U1=I1R1=14.0,4=5,6V\)

\(\Rightarrow Ucb=U2=2,4V\)

Answer 2

11. R1 nt (R2 //R3)

a,\(\Rightarrow U2=U3=Umb=14,4V\)

\(\Rightarrow\left\{{}\begin{matrix}I2=\dfrac{U2}{R2}=1,44A\\I3=\dfrac{U3}{R3}=0,96A\end{matrix}\right.\)\(\Rightarrow I1=I2+I3=2,4A\)

b,\(\Rightarrow R1=\dfrac{Uab-Umb}{I1}=\dfrac{25}{6}\Omega\)