Question

Answer 1

tinh Ia3=?? ak?

=>R1 nt { R4//{R2 nt { R5//(R3 nt R6 nt Ra2)ntRa1}ntRa3}}}

\(\Rightarrow Ia1=I+Ia2\Rightarrow I5=Ia1-Ia2=0,6A\)

\(\Rightarrow\dfrac{0,2\left(R+R+Ra2\right)}{R}=0,6< =>\dfrac{0,2\left(2R+Ra2\right)}{R}=0,6=>0,4R+0,2Ra2=0,6R=>Ra2=R=Ra1=Ra3\)

\(\Rightarrow R365a2=\dfrac{3R.R}{3R+R}=\dfrac{3}{4}R\left(\Omega\right)\)

\(\Rightarrow I4=\dfrac{Ia1.\left(R+R+\dfrac{3}{4}R\right)}{R}=0,8\left(2+\dfrac{3}{4}\right)=2,2A\)

\(\Rightarrow Ia3=Ia1+I4=2,2+0,8=3A\)