Electric resistance is the measure of a material’s opposition to the flow of electric current. The higher the electric resistance of a material, the more it opposes the flow of current. Electric resistance is measured in ohms.

Materials with high electric resistance are used in electrical circuits as resistors. Resistors are used to control the amount of current flowing through a circuit. They are also used to create voltage drops in circuits, which can be useful for many purposes such as powering light bulbs or motors.

Some materials have very low electric resistances and are known as conductors. Conductors are used to create electrical wires and other components that allow electricity to flow freely through them with little opposition.