Question

Giúp mình với ạ. Mình cảm ơn

Answer 1

\(R_{123}=R_1+R_2+R_3=18+5+7=30\Omega\)

\(R_{45}=R_4+R_5=14+6=20\Omega\)

\(R_{tđ}=\dfrac{R_{123}\cdot R_{45}}{R_{123}+R_{45}}=\dfrac{30\cdot20}{30+20}=12\Omega\)

\(U_{123}=U_{45}=U_m=36V\)

\(I_1=I_2=I_3=\dfrac{U_{123}}{R_{123}}=\dfrac{36}{30}=1,2A\)

\(I_4=I_5=I_{45}=\dfrac{U_{45}}{R_{45}}=\dfrac{36}{20}=1,8A\)