Mạch RLC mắc nối tiếp có \(R = 100\sqrt{3}\Omega\)...

B

- Hướng dẫn giải

\(R=100\sqrt{3}, L=\frac{1}{\pi }H,C=\frac{10^{-4}}{2\pi }\)

\(R_{RL}=200cos100\pi t(V)\Rightarrow \left\{\begin{matrix} Z_{L}=100\Omega \\ Z_{C}=200\Omega \end{matrix}\right.\)

\(\frac{U_{oRL}<\varphi _{U_{RL}}}{R+Z_{L}i}.\begin{bmatrix} R+(Z_{L}-Z_{C})i \end{bmatrix}=U_{0}<\varphi _{u}\)

\(\Rightarrow \frac{200}{100\sqrt{3}+100i}.(100\sqrt{3}-100i)=200<-\frac{\pi }{3}\)