\(R_{tđ}=\dfrac{R_1.R_2}{R_1+R_2}=\dfrac{6.10}{6+10}=3,75\left(\Omega\right)\)
\(U=U_1=U_2=12V\)
\(\left\{{}\begin{matrix}I=\dfrac{U}{R}=\dfrac{12}{3,75}=3,2\left(A\right)\\I_1=\dfrac{U_1}{R_1}=\dfrac{12}{6}=2\left(A\right)\\I_2=\dfrac{U_2}{R_2}=\dfrac{12}{10}=1,2\left(A\right)\end{matrix}\right.\)
a) Điện trở tương đương:
\(R_{tđ}=\dfrac{R_1\cdot R_2}{R_1+R_2}=\dfrac{6\cdot10}{6+10}=3,75\Omega\)
b) Hai điện trở mắc song song \(\Rightarrow U_1=U_2=U_{AB}=12V\)
\(I_1=\dfrac{U_1}{R_1}=\dfrac{12}{6}=2A\)
\(I_2=\dfrac{U_2}{R_2}=\dfrac{12}{10}=1,2A\)