\textbf{182.} A capacitor whose voltage can be adjusted is connected to a battery. If the voltage across the capacitor is changed from 2 V to 15 V, how many times does the stored energy in it become?
\begin{itemize}
\item[(1)] $\dfrac{3}{4}$
\item[(2)] $\dfrac{2}{3}$
\item[(3)] $\dfrac{9}{16}$
\item[(4)] $\dfrac{3}{16}$
\end{itemize}
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