Physics · Electrostatic Potential

What is the electric potential due to an electric dipole in its equatorial plane at a distance \( r \) from its center?

1. Zero
2. \( \frac{1}{4\pi\varepsilon_0}\frac{p}{r^2} \)
3. \( \frac{1}{4\pi\varepsilon_0}\frac{p}{r^3} \)
4. Infinity