Physics · JEE | Electrostatic Potential and Capacitance

What is the electrostatic potential \( V(r) \) at a distance \( r \) from a point charge \( Q \)?

1. A
   \( V(r) = \frac{1}{4\pi\varepsilon_0} Q r \)
2. B
   \( V(r) = \frac{1}{4\pi\varepsilon_0} \frac{Q}{r^2} \)
3. C
   \( V(r) = \frac{1}{4\pi\varepsilon_0} \frac{Q^2}{r} \)
4. D
   \( V(r) = \frac{1}{4\pi\varepsilon_0} \frac{Q}{r} \)