\section{実験結果}

\subsection{実験1}

それぞれの抵抗の理論値と実測値を\cref{fig:v-i-r}に示す．なお，理論値には$\pm 5\%$の誤差の範囲も同時に表示している．

\begin{figure}[tbh]
    \centering
    \input{assets/a-2/exp1}
    \caption{Voltage v.s. Current of Differenct Resistors with Theoretical Values and Error Ranges}
    \label{fig:v-i-r}
\end{figure}

\newpage

\subsection{実験2}

\subsubsection{回路(a)}

$E_1 = 15.000 \ \text{V}, \ E_2 = 3.005 \ \text{V}$の時，各抵抗での電流・電圧は\cref{tab:exp2-res1}となった：

%I1 = -3.28m, V1 = 10.69
%I2 = 1.31m, V2 = 1.296
%I3 = 1.98m, V3 = 4.297

\begin{table}[ht]
    \centering
    \caption{Result of Experiment \# 2 with Circuit (a)}
    \label{tab:exp2-res1}
    \begin{tabular}{crr}
        \hline
        Resistor & Voltage $[\text{V}]$ & Current $[\text{mA}]$ \\
        \hline
        $R_1$ & 10.69 & 3.28 \\
        $R_2$ & 1.30 & -1.31 \\
        $R_3$ & 4.30 & 1.98 \\
        \hline
    \end{tabular}
\end{table}

\subsubsection{回路(b)}

$E_1 = 15.000 \ \text{V}, \ E_2 = -3.007 \ \text{V}$の時，各抵抗での電流・電圧は\cref{tab:exp2-res2}となった：

%I1 = 4.33m, V1 = 14.10
%I2 = -3.93m, V2 = -3.891
%I3 = -0.40m, V3 = 0.890

\begin{table}[ht]
    \centering
    \caption{Result of Experiment \# 2 with Circuit (b)}
    \label{tab:exp2-res2}
    \begin{tabular}{crr}
        \hline
        Resistor & Voltage $[\text{V}]$ & Current $[\text{mA}]$ \\
        \hline
        $R_1$ & 14.10 & 4.33 \\
        $R_2$ & 3.89 & -3.93 \\
        $R_3$ & 0.89 & 0.40 \\
        \hline
    \end{tabular}
\end{table}

\subsection{実験3}

\subsubsection{$E_1$のみ}

$E_1 = 15.000 \ \text{V}$での各抵抗にかかった電流・電圧は\cref{tab:exp3-res1}となった：

%I1 = 3.81m
%I2 = 2.61m
%I3 = 1.19m
%V1 = 12.40
%V2 = 2.596
%V3 = 2.593

\begin{table}[ht]
    \centering
    \caption{Result of Experiment \# 3 with $E_1$ as Voltage Source}
    \label{tab:exp3-res1}
    \begin{tabular}{crr}
        \hline
        Resistor & Voltage $[\text{V}]$ & Current $[\text{mA}]$ \\
        \hline
        $R_1$ & 12.40 & 3.81 \\
        $R_2$ & 2.61 & 2.61 \\
        $R_3$ & 2.59 & 1.19 \\
        \hline
    \end{tabular}
\end{table}

\subsubsection{$E_2$のみ}

$E_2 = 3.004 \ \text{V}$での各抵抗にかかった電流・電圧は\cref{tab:exp3-res2}となった：

\begin{table}[ht]
    \centering
    \caption{Result of Experiment \# 3 with $E_2$ as Voltage Source}
    \label{tab:exp3-res2}
    \begin{tabular}{crr}
        \hline
        Resistor & Voltage $[\text{V}]$ & Current $[\text{mA}]$ \\
        \hline
        $R_1$ & 1.71 & 0.52 \\
        $R_2$ & 1.29 & 1.32 \\
        $R_3$ & 1.70 & 0.78 \\
        \hline
    \end{tabular}
\end{table}

\subsection{実験4}

%Calculated value: R_t = \frac{R_{1} R_{2}}{R_1 + R_2} = 1320, V_t = \frac{R_{2}E_{1}}{R_1 + R_2} = 6

等価回路でのパラメータの値は$V_{t} = 6 \ \text{V}, \ R_{t} = 1320 \ \Omega$となった．これらの値に元にした実験の結果を\cref{tab:exp4-res}にまとめる．

\begin{table}[htb]
    \centering
    \caption{Voltage and Current of Load}
    \label{tab:exp4-res}
    \begin{tabular}{crr}
        \hline
        Circuit & Voltage $[\text{V}]$ & Current $[\text{mA}]$ \\
        \hline
        Original Circuit & 2.595 & 2.62 \\
        Replaced with Variable Resistor & 2.576 & 2.61 \\
        \hline
    \end{tabular}
\end{table}

%without vr: 2.595V, 2.62mA
%with vr: 2.576V, 2.61mA