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Ratio of the forces between charges at the corners of a square (side and diagonal)

The same question, asked 2 times: May 2022 S1*, 23 Apr 2025 S1. Every wording below, oldest first.

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  1. Question 1

    May 2022 S1

    46
    Three equal charges q1q_1, q2q_2 and q3q_3 are placed on the three corners of a square of side aa. If the force between q1q_1 and q2q_2 is F12F_{12} and that between q1q_1 and q3q_3 is F13F_{13}, then the ratio of magnitudes F12F13\frac{F_{12}}{F_{13}} is

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  2. Question 2

    23 Apr 2025 S1

    41
    Three equal charges are placed on the three corners of a square as shown below. If the magnitude of force between 'q1q_{1}' and 'q2q_{2}' is 'F12F_{12}' and that between 'q1q_{1}' and 'q3q_{3}' is F13F_{13}, then the ratio of F13F_{13} to F12F_{12} is

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