What is defined as the potential difference between two points?

The potential difference between two points is defined as voltage. Voltage, measured in volts, represents the energy per unit charge that is available to move electrons from one point to another in an electric circuit. It is a key concept in understanding how electrical circuits function, as it drives the flow of current through the circuit components.

Current refers to the flow of electric charge, typically measured in amperes, indicating how much charge is passing through a point in the circuit per unit of time, while resistance is a measure of how much a component opposes the flow of current, measured in ohms. Power, measured in watts, is the rate at which energy is transferred or converted, which can be calculated using voltage and current but is not the same as voltage. Understanding these distinctions is crucial for grasping the principles of electronics and circuit design.