In the context of electric potential, what does voltage describe between two points?

• A. The force per unit charge at a point (the electric field magnitude), $E=\frac{F}{q}$
• B. The electric potential energy change per unit charge, $V=\frac{\Delta U}{q}$
• C. The resistance to current flow, $R=\frac{V}{I}$
• D. The total electric charge stored on an object, $Q$

Answer: (B)