\textbf{61--} Three equal point charges are placed at the vertices of a square. $q_1$ and $q_2$ are at two ends of one side, and $q_2$ and $q_3$ are at two ends of a diagonal. The magnitude of the force that $q_1$ exerts on $q_2$ is how many times the force that $q_2$ exerts on $q_3$?
\[
\text{(1)}\ \sqrt{2} \qquad \text{(2)}\ 2 \qquad \text{(3)}\ \frac{1}{2} \qquad \text{(4)}\ \frac{\sqrt{2}}{2}
\]
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