Electric Potential and Potential Energy

Electric potential at a point is electric potential energy per unit charge. **V = Uq Unit: volt (V) and: 1 V = 1 J/C**

For a point charge: **V = kQ/r** Potential is a scalar quantity.

A charge in an electric field can possess electric potential energy. For two point charges: **U = kq₁q₂/r** The sign of U depends on the signs of the charges.

Potential difference tells us how much electric potential energy changes per unit charge: **ΔV = ΔUq**