Add solutions and graphics to Serway and Jewett v8's chapter 26 problems.
[course.git] / latex / problems / Serway_and_Jewett_8 / problem26.31.tex
1 \begin{problem*}{26.31}
2 A $12.0\U{V}$ battery is connected to a capacitor, resulting in
3 $54.0\U{$\mu$C}$ of charge stored on the capacitor.  How much energy
4 is stored in the capacitor?
5 \end{problem*}
6
7 \begin{solution}
8 Just plug into the capacitor energy formula,
9 \begin{equation}
10   U = \frac{1}{2}CV^2
11     = \frac{1}{2}QV
12     = \frac{1}{2} \cdot (54.0\E{-6}\U{C}) \cdot (12.0\U{V})
13     = \ans{324\U{$\mu$J}} \;.
14 \end{equation}
15 \end{solution}