Có \(U_{MP}=V_M-V_P=V_M-V_A+V_A-V_P=U_{MA}+U_{AP}=1\left(V\right)\)
\(\Leftrightarrow U_4-U_1=1\left(V\right)\)
PTMĐ: (R1ntR2ntR3)//(R4ntR5ntR6)
=> I1=I2=I3; I4=I5=I6
\(\Rightarrow I_4.R_4-I_1.R_1=1\Leftrightarrow2R_6.I_4-3R_3.I_1=1\Leftrightarrow2R_6.\left(I-I_1\right)-3R_3.I_1=1\)
\(\Rightarrow R_6\left(I-I_1\right)=\frac{1+3R_3.I_1}{2}\)
Có \(U_{AB}=\frac{11}{2}R_3.I_1+5R_6.\left(I-I_1\right)=\frac{11}{2}R_3.I_1+5.\frac{1+3R_3.I_1}{2}\)
\(=\frac{26R_3.I_1+5}{2}\)
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