Question

Giúp em với ạ

Answer 1

R3 nt(R1//R2)

\(a,\Rightarrow Rtd=R3+\dfrac{R1R2}{R2+R1}=20\Omega\)

\(b\Rightarrow\left\{{}\begin{matrix}U23=I3.\left(\dfrac{R1R2}{R1+R2}\right)=2,4V\\I2=\dfrac{U23}{R2}=\dfrac{2,4}{24}=0,1A\\I1=I3-I2=0,3A\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}I1=I3-I2=0,3A\\I2=0,1A\\I3=0,4A\end{matrix}\right.\)