a) Calcolo della resistenza totale nel circuito :

R_3,4=(R₃)(R₄)/R₃+R₄=18/3+6=2W

R_6,7=(R₆)(R₇)/R₆+R₇= 162/18+9=6W

R_3,4,5=R_3,4+R₅=2+10=12W

R_2,3,4,5=(R₂)(R_3,4,5)/R₂+R_3,4,5=144/12+12=6W

R_2,3,4,5,6,7=(R_2,3,4,5)(R_6,7)/R_2,3,4,5+R_6,7=36/6+6=3W

R_{1,2,3,4,5,6,7}=R₁+R_2,3,4,5,6,7=7+3=10W

b,c) Calcolo della corrente e della differenza di potenziale di ciascun resistore :    

V_2,3,4,5,6,7=(i)(R_2,3,4,5,6,7)=(24)(3)=72V

i₂=V_2,3,4,5,6,7/R₂= 72/12=6A

i_3,4,5=V_2,3,4,5,6,7/R_3,4,5=72/12=6A

V₅=(i_3,4,5)(R₅)=(6)(10)=60V

V_3,4=(i_3,4,5)(R_3,4)=(6)(2)=12V

i₃=V_3,4/R₃=12/3=4A

i₄=V_3,4/R₄=12/6=2A

i_6,7=V_2,3,4,5,6,7/R_6,7=72/6=12A

i₆=V_2,3,4,5,6,7/R₆=72/18=4A

i₇=V_2,3,4,5,6,7/R₇=72/9=8A

V₁=(i)(R₁)=(24)(7)=168V