Electrostatics

Three equal charges '\(\mathrm{q}_1\)', '\(^{\prime} \mathrm{q}_2\)' and '\(\mathrm{q}_3\)' are placed on the three corners of a square of side 'a'. If the force between \(\mathrm{q}_1\) and \(\mathrm{q}_2\) is '\(\mathrm{F}_{12}\)' and that between \(\mathrm{q}_1\) and \(\mathrm{q}_3\) is '\(\mathrm{F}_{13}\)', then the ratio of magnitudes \(\left(\frac{F_{12}}{F_{13}}\right)\) is