Electric resistance refers to the property of a material or a component within an electrical circuit that impedes the flow of electric current. It is measured in ohms (Ω). Resistance occurs due to the interactions between the electrons and atoms within a material. Materials with high resistance restrict the flow of electrons more, while those with low resistance allow electrons to flow more easily. The resistance of a material is influenced by factors such as its dimensions, temperature, and composition. For example, longer conductors tend to have higher resistance, while wider conductors typically have lower resistance. Additionally, certain materials, like metals, generally exhibit low resistance, while insulating materials have high resistance.