\begin{longtable}[]{@{}lll@{}}
\begin{minipage}[t]{0.45\columnwidth}\raggedright\strut
\textbf{Metallic Conductor}{: For a metallic conductor at a constant temperature that obeys Ohm's Law, the I-V characteristic is a straight line passing through 0 and has a constant resistance.}\strut
\end{minipage} & \begin{minipage}[t]{0.45\columnwidth}\raggedleft\strut
\includegraphics[]{Images/Conductor-IV.png}\strut
\end{minipage}\tabularnewline
\begin{minipage}[t]{0.45\columnwidth}\raggedright\strut
\textbf{Filament Lamp}{: For a typical filament lamp, as current increases, the heating effect on the lamp also increases, forming a sigmoid graph shape.}\strut
\end{minipage} & \begin{minipage}[t]{0.45\columnwidth}\raggedleft\strut
\includegraphics[]{Images/Lamp-IV.png}\strut
\end{minipage}\tabularnewline
\begin{minipage}[t]{0.45\columnwidth}\raggedright\strut
\textbf{Semiconductor Diode}{: A diode ideally only allows current to flow in one direction. Current flows easily through a diode in the forward-biased mode and resistance is low. When reverse potential difference is applied, resistance is high. Current that leaks through is called the leakage current and past the breakdown voltage, the diode stops working and allows all current through.}\strut
\end{minipage} & \begin{minipage}[t]{0.45\columnwidth}\raggedleft\strut
\includegraphics[]{Images/Diode-IV.png}\strut
\end{minipage}\tabularnewline
\begin{minipage}[t]{0.45\columnwidth}\raggedright\strut
\textbf{Thermistor}{: A resistance element made of semiconductor material. Increased potential difference across the thermistor results in increased current, causing the temperature to rise.}
{As temperature rises, a PTC (Positive Temperature Coefficient) thermistor will have a higher resistance, while an NTC (Negative Temperature Coefficient) thermistor will have a lower resistance. (Graph shows the more common NTC thermistor)}\strut
\end{minipage} & \begin{minipage}[t]{0.45\columnwidth}\raggedleft\strut
\includegraphics[]{Images/Thermistor-IV.jpg}\strut
\end{minipage}\tabularnewline
\end{longtable}