Physics · Electrostatic Potential

Three charges \( +q, +q \) and \( -q \) are placed at the vertices of an equilateral triangle of side \( d \). The total potential energy of the system is:

1. A
   \( \frac{1}{4\pi\varepsilon_0} \frac{q^2}{d} \)
2. B
   \( -\frac{1}{4\pi\varepsilon_0} \frac{q^2}{d} \)
3. C
   \( \frac{1}{4\pi\varepsilon_0} \frac{3q^2}{d} \)
4. D
   \( -\frac{1}{4\pi\varepsilon_0} \frac{3q^2}{d} \)