What is the electromotive force between two points in a circuit called?

The electromotive force between two points in a circuit is referred to as voltage. Voltage represents the potential difference that drives electrical current through a circuit, essentially indicating how much energy per unit charge is available to move electrons from one point to another. It can be thought of as the "pressure" that pushes electrical charges through a circuit, similar to how water pressure pushes water through a pipe.

Voltage is measured in volts (V) and is a fundamental concept in understanding electrical circuits, as it plays a critical role in determining how current flows, the amount of energy available to do work, and the overall functionality of electrical devices. Understanding voltage is essential for anyone working with electrical systems, as it directly affects the performance and behavior of various components within those systems.

While current refers to the flow of electric charge, resistance is the opposition to that flow, and power is the rate at which energy is transferred or converted. Each of these concepts is related to voltage, but voltage specifically describes the electric potential difference between two points in a circuit.