\(MCD:R_1ntR_2ntR_3\)
Ta có: \(I=I_1=I_2=I_3=1,5A\)
\(\Rightarrow\left\{{}\begin{matrix}R_1=\dfrac{U_1}{I_1}=\dfrac{75-67,5}{1,5}=5\Omega\\R_2=\dfrac{U_2}{I_2}=\dfrac{37,5-\left(75-67,5\right)}{1,5}=20\Omega\\R_3=\dfrac{U_3}{I_3}=\dfrac{75-\left(75-67,5\right)-\left(37,5-\left(75-67,5\right)\right)}{1,5}=25\Omega\end{matrix}\right.\)
Đúng 2
Bình luận (0)
