The resistance, denoted by the symbol R, is a fundamental property of an electrical component or circuit that opposes the flow of electric current through it.

Resistance is caused by collisions between electrons and atoms within a substance, which in turn leads to a conversion of electric energy into other forms, such as heat or light.

Resistance is measured in ohms (Ω) and is determined by various factors including the material’s resistivity, length, cross-sectional area, and temperature.