Question: What is the electric potential (V) at a distance (r) from a point charge (Q)?

Options:

1. V = k * Q / r
2. V = k * Q * r
3. V = Q / (4 * π * ε * r^2)
4. V = Q / (4 * π * ε * r)

Correct Answer: V = k * Q / r

Solution:

The electric potential due to a point charge is given by V = k * Q / r, where k is Coulomb\'s constant.