What is the term used to describe opposition to current flow?

The term that describes opposition to current flow is resistance. Resistance is a fundamental property of materials that impedes the movement of electric charge, determining how much current will flow for a given voltage according to Ohm's Law. Essentially, when a voltage is applied across a conductor, resistance affects how easily electrons can move through that conductor. Higher resistance means less current will flow, while lower resistance allows more current to pass through.

Voltage, on the other hand, refers to the electrical potential difference between two points and is the driving force that pushes current through a circuit. Current is the actual flow of electric charge, measured in amperes, and power represents the rate at which energy is transferred or converted in an electrical circuit. Understanding resistance is crucial for analyzing and designing circuits, as it directly influences both current flow and overall circuit behavior.