Final answer:
Voltage is an alternative term for electrical potential difference, indicating the work needed to move a charge between two points, typically measured between the terminals of a battery. It is analogous to gravitational potential energy with an arbitrary zero point and is measured in volts.
Step-by-step explanation:
Another term for the electrical potential difference between two points, such as the terminals on a battery, is voltage. This refers to the work required to move a unit charge from one point to another. The concept of voltage is similar to gravitational potential energy in that the zero point is arbitrary. If one point is considered to be at a zero potential, the voltage at another point, relative to this zero potential, reflects the potential energy per unit charge at that point. Every battery exhibits a voltage that signifies the potential difference between its two terminals. Additionally, when dealing with circuits, it's important to differentiate between electromotive force (emf) and terminal potential difference, both calculated in volts, but the latter is specific to a battery within a complete circuit.