Potensial dan Energi Listrik

Jarak antara titik A ke titik P

\begin{equation*}
\begin{split}
AC^2 & = AB^2 + BC^2 \\\\
AC^2 & = 4^2 + 4^2 \\\\
AC^2 & = 32 \\\\
AC & = 4 \sqrt{2} \\\\
AP & = 2 \sqrt{2} \text{ m}
\end{split}
\end{equation*}

Potensial listrik di titik P

\begin{equation*}
\begin{split}
V & =\Sigma k \frac{Q}{r} \\\\
V & = k \:.\: \left(\frac{1 \:.\: 10^{-6}}{2\sqrt{2}} + \frac{1 \:.\: 10^{-6}}{2\sqrt{2}} - \frac{5 \:.\: 10^{-6}}{2\sqrt{2}} - \frac{5 \:.\: 10^{-6}}{2\sqrt{2}}\right) \\\\
V & = 9 \:.\: 10^9 \:.\: \frac{-8 \:.\: 10^{-6}}{2\sqrt{2}}  \quad {\color {blue} \times \frac{\sqrt{2}}{\sqrt{2}}}\\\\
V & = -18\sqrt{2} \:.\: 10^{3} \text{ V}
\end{split}
\end{equation*}