\(R_1nt\left[\left(R_2ntR_3\right)//R_4\right]\)
\(\Rightarrow R_{td}=R_1+\frac{\left(R_2+R_3\right).R_4}{R_2+R_3+R_4}=...\left(\Omega\right)\)
\(\Rightarrow I_{td}=I_1=I_{234}=\frac{U_{AB}}{R_{td}}=...\left(A\right)\)
\(\Rightarrow U_1=I_1.R_1=...\left(V\right)\)
\(\Rightarrow U_{234}=U_{23}=U_4=I_{234}.R_{234}=I.\frac{\left(R_2+R_3\right)R_4}{R_2+R_3+R_4}=...\left(V\right)\)
\(\Rightarrow I_4=\frac{U_4}{R_4}=...\left(A\right)\)
\(I_2=I_3=\frac{U_{234}}{R_2+R_3}=...\left(A\right)\)
giúp mình với ạ
cảm ơn m.n
