186. In the circuit below, when the switch is closed, how does the potential difference across the $5\,\Omega$ resistor change? [Figure: Circuit with $5\,\Omega$, $30\,\Omega$, $4\,\Omega$ resistors, switch $k$, battery $\varepsilon = 18\,\text{V}$, $r = 1\,\Omega$]
[(1)] Decreases by $8$ volts.
[(2)] Increases by $8$ volts.
[(3)] Decreases by $1$ volt.
[(4)] Increases by $1$ volt.
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\textbf{186.} In the circuit below, when the switch is closed, how does the potential difference across the $5\,\Omega$ resistor change?
\begin{center}
\textit{[Figure: Circuit with $5\,\Omega$, $30\,\Omega$, $4\,\Omega$ resistors, switch $k$, battery $\varepsilon = 18\,\text{V}$, $r = 1\,\Omega$]}
\end{center}
\begin{enumerate}
\item[(1)] Decreases by $8$ volts.
\item[(2)] Increases by $8$ volts.
\item[(3)] Decreases by $1$ volt.
\item[(4)] Increases by $1$ volt.
\end{enumerate}
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