\(R=\dfrac{U}{I}=\dfrac{24}{0,6}=40\Omega\)
\(\dfrac{R1}{R2}=\dfrac{l1}{l2}\Rightarrow l2=\dfrac{R2\cdot l1}{R1}=\dfrac{40\cdot10}{5}=80\left(m\right)\)
Chọn C
\(R=\dfrac{U}{I}=\dfrac{24}{0,6}=40\left(\Omega\right)\)
\(\dfrac{R_1}{R_2}=\dfrac{l_1}{l_2}\Rightarrow l_2=\dfrac{R_2.l_1}{R_1}=\dfrac{40.10}{5}=80\left(m\right)\)
=> Chọn C