Physics · Electrostatic Potential

What is the potential due to a point charge \( Q = +5\text{ \mu C} \) at a distance \( r = 0.5\text{ m} \) from the charge?

1. \( 4.5 \times 10^4\text{ V} \)
2. \( 9.0 \times 10^4\text{ V} \)
3. \( 1.8 \times 10^5\text{ V} \)
4. \( 3.6 \times 10^5\text{ V} \)