Question

Answer 1

a, \(\Rightarrow R1ntR2\)

\(\Rightarrow R1+R2=\dfrac{Uab}{Ia}=\dfrac{12}{0,6}=20\Omega\Rightarrow R2=20-R1=12\Omega\)

b, \(\Rightarrow R1nt\left(R2//R3\right)\)

\(\Rightarrow Ia=I1=I23=0,75A\Rightarrow U23=Uab-U1=12-I1.R1=6V\)

\(\Rightarrow R23=\dfrac{R2R3}{R2+R3}=\dfrac{6}{0,75}=8\Omega\Rightarrow R3=24\Omega\)

c,\(\Rightarrow R1ntR3\)

\(\Rightarrow Ia=\dfrac{Uab}{R1+R3}=\dfrac{12}{8+24}=0,375A\)