How does a current differ from voltage in electrical circuits?

The distinction between current and voltage is fundamental to understanding how electrical circuits operate. Current refers to the flow of electric charge in a circuit, which is typically carried by electrons moving through a conductor. This flow is driven by a difference in voltage, which can be thought of as the electrical "pressure" that pushes the charge through the circuit.

Voltage, often referred to as electric potential difference, is the force that causes current to flow from one point to another. It is a measure of potential energy per unit charge and can be visualized as the height of water in a tank: the greater the height (or voltage), the greater the potential energy and the stronger the flow of water (or current).

Thus, the accurate definition captures the relationship between these two concepts: current is the flow of charge, while voltage provides the necessary pressure to facilitate that flow. This relationship is fundamental in analyzing and designing electrical circuits, as it allows us to determine how much current will flow for a given voltage and resistance, as described by Ohm's law.

The other options present misunderstandings about the nature of current and voltage. For example, measuring units are incorrectly paired, and the descriptions of usage and behavior in the circuit fail to capture their true roles. Understanding the