Resistivity is a term used to describe the resistance a material has to electrical current. Synonyms for resistivity include electrical resistance, electrical conductivity, impedance, and ohmic resistance. Electrical resistance is the measure of the degree to which an object opposes electrical current. Electrical conductivity is the ability of a material to conduct electricity. Impedance is the total opposition to the flow of electrical current in a circuit, and ohmic resistance is resistance that is directly proportional to the current flowing through a material. Together, all of these synonyms describe the behavior of materials in relation to electrical current. Understanding these concepts can be important in fields such as engineering and electronics.