Physics · Electrostatic Potential

What is the potential energy change \( \Delta U \) when a charge \( q \) is moved between two points having a potential difference \( \Delta V = V_P - V_R \)?

1. \( \Delta U = q^2 \Delta V \)
2. \( \Delta U = \frac{\Delta V}{q} \)
3. \( \Delta U = \frac{q}{\Delta V} \)
4. \( \Delta U = q \Delta V \)