Voltage is the potential difference between two points.

• A. Potential difference
• B. Potential energy
• C. Electric current
• D. Resistance

Answer: (A)

Voltage is the electric potential difference between two points. This means it measures how much energy per unit charge would be gained or lost when moving a charge from one point to the other. That difference acts as the driving force that pushes charges to flow through a circuit when a path exists. The volt is the unit, defined as one joule per coulomb. While potential energy is the energy a single charge has due to its position, voltage captures the difference between two points and is what causes current to move. Electric current is the rate of charge flow, and resistance is how much a component opposes that flow. So the term that describes the difference in potential between two points is precisely what voltage represents.