What is the symbol for resistance in electrical circuits?

The symbol for resistance in electrical circuits is represented by the Greek letter omega (Ω). Resistance is a measure of the opposition to the flow of electric current in a circuit, and omega is standardized as the unit of resistance called the ohm. This unit highlights the relationship between voltage, current, and resistance as described by Ohm's Law, which states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance. Thus, resistance is crucial in circuit design and analysis, allowing engineers and technicians to determine how much current will flow under specific voltage conditions.

In contrast, the letter R is commonly used to denote resistance in equations or circuit diagrams but is not the symbol for the unit itself. The letter W represents watts, which is a unit of power, while A is the symbol for amperes, a unit of measure for electric current. Understanding these symbols helps clarify communication and calculations in electrical and electronic engineering.