What happens when two points of unequal potential are connected?

When two points of unequal potential are connected, current flows between them. This movement of electric charge occurs because the difference in potential creates an electric field, which drives the charge carriers (typically electrons) from the area of higher potential to the area of lower potential. This is fundamental in understanding how circuits work; a voltage (or potential difference) across a conductor allows current to flow, and the greater the difference in potential, the more current flows, assuming the resistance remains constant.

In practical terms, when connecting two points with an unequal voltage, it's important to consider the load that may be connected within the circuit. If the resistance is low or the circuit is complete, the resulting flow of current can produce useful work, such as lighting a bulb or powering a device. In contrast, if there is no potential difference between the two points, or if they are isolated from each other, no current will flow.