1.
[tex]R_{12}=\frac{R_1*R_2}{R_1+R_2}=\frac{16*16}{16+16}=\frac{256}{32}=8 \ \Omega\\ \\R_{123}=R_{12}+R_3=8+8=16 \ \Omega\\ \\R_z=\frac{R_{123}*R_4}{R_{123}+R_4}=\frac{16*48}{16+48}=\frac{768}{64}=12 \ \Omega[/tex]
2.
[tex]I=\frac{U}{R_z}=\frac{24}{12}=2 \ A[/tex]
3.
Z prawa Ohma
[tex]I_4=\frac{U}{R_4}=\frac{24}{48}=0,5 \ A[/tex]
Z I prawa Kirchhoffa
[tex]I_3=I_{12}=I_{123}=I-I_4=2-0,5=1,5 \ A[/tex]
analogicznie
[tex]U_{12}=I_{12}*R_{12}}=1,5*8=12 \ V\\ \\I_1=\frac{U_{12}}{R_1}=\frac{12}{16}=0,75 \ A\\ \\I_2=I_{12}-I_1=1,5-0,75=0,75 \ A[/tex]
