Có: U1=R1.I=6.2=12(V)
Vì R1nt (R2//R3)
\(\Rightarrow U_{23}=U_{AB}-U_1=24-12=12\left(V\right)\)
mà R2//R3 nên :
\(\Rightarrow U_2=U_3=U_{23}=12\left(V\right)\)
Khi đó :
\(\Rightarrow I=I_1=2A\)
\(\Rightarrow I_2=\frac{U_2}{R_2}=\frac{12}{2}=6A\)
\(\Rightarrow I_3=\frac{U_3}{R_3}=\frac{12}{4}=3\left(A\right)\)