What does voltage represent in an electrical circuit?

Voltage represents electrical pressure within a circuit, which is the force that pushes electric charges to move through a conductor. This concept is crucial for understanding how electricity flows; higher voltage means there is more potential energy available to move the electric charges. It is analogous to water pressure in a pipe, where higher pressure pushes water (like electrical current) through the plumbing system.

The other concepts, while related to electricity, pertain to different aspects of circuits. Resistance relates to how much a component opposes current flow, flow of electrons pertains to the current itself, and storage of electrical energy refers to components like batteries or capacitors that hold energy but do not define the electrical pressure, which is specifically associated with voltage. Understanding this distinction helps in grasping the fundamental principles of electrical circuits and their behavior.