Which of the following correctly describes voltage?

Voltage is defined as the electric potential difference between two points in a circuit. It serves as the force or "push" that drives electrons through the circuit, allowing current to flow. This force is essential for creating an electric flow that powers devices and systems.

In the context of electrical systems, understanding voltage is crucial because it directly influences how electrical components behave. Higher voltage means a stronger push on the electrons, leading to a greater current, provided resistance remains constant. This is fundamental for both designing circuits and troubleshooting issues in electrical systems, as it helps in determining how much energy is available to be converted into other forms.

The other options pertain to different electrical concepts: resistance refers to opposition to the flow of current; quantity relates to the number of electrons which does not describe voltage; and the storage capability of a battery pertains to its capacity to hold charge, not the force exerted by that charge. Therefore, recognizing voltage as the driving force in a circuit is key to understanding how electrical systems function.