Physics · JEE | Electric Charges and Fields

What is the magnitude of force on each pair of charges \( q \) and \( -q \) placed at the vertices of an equilateral triangle of side \( l \)?

1. A
   \( F = \frac{1}{4\pi\varepsilon_0} \frac{q^2}{l} \)
2. B
   \( F = \frac{1}{4\pi\varepsilon_0} \frac{\sqrt{3} q^2}{l^2} \)
3. C
   \( F = \frac{1}{4\pi\varepsilon_0} \frac{q^2}{l^2} \)
4. D
   \( F = \frac{1}{4\pi\varepsilon_0} \frac{2q^2}{l^2} \)