Résistance

Résistance, or resistance, refers to the opposition a material offers to the flow of electric current. Think of it like a narrow road that makes it harder for cars (electric charges) to pass through. Materials with high resistance, like rubber, restrict current flow, while conductors like copper have low resistance. Resistance determines how much energy is lost as heat in electrical systems. It depends on the material's properties, its temperature, and its size and shape. Understanding resistance is essential for designing efficient electrical circuits and devices.