Đáp án:
$\begin{array}{l}
a.T = {2.10^{ - 7}}\pi \left( s \right)\\
f = 1591549\left( {Hz} \right)\\
b.\\
{T_{nt}} = 5,{62.10^{ - 7}}\left( s \right)\\
{T_{//}} = 1,{4.10^{ - 6}}\left( s \right)
\end{array}$
Giải thích các bước giải:
$\begin{array}{l}
a.T = \frac{{2\pi }}{\omega } = \frac{{2\pi {q_0}}}{{{I_o}}} = \frac{{2\pi {{.10}^{ - 6}}}}{{10}} = {2.10^{ - 7}}\pi \left( s \right)\\
f = \frac{1}{T} = 1591549\left( {Hz} \right)\\
b.\left\{ \begin{array}{l}
T' = 2T\\
T = 2\pi \sqrt {LC}
\end{array} \right. \Rightarrow C' = 4C\\
+ CntC' \Rightarrow {C_{nt}} = \frac{{CC'}}{{C + C'}} = 0,8C\\
{T_{nt}} = \sqrt {0,8} T = 5,{62.10^{ - 7}}\left( s \right)\\
+ C//C' \Rightarrow {C_{td}} = C + C' = 5C\\
{T_{//}} = \sqrt 5 T = 1,{4.10^{ - 6}}\left( s \right)\\
\end{array}$
