What symbol do we commonly use to represent resistance?

The symbol commonly used to represent resistance in electrical engineering and physics is Omega (Ω). This symbol is derived from the Greek alphabet, where Omega is the last letter, signifying the concept of resistance as a limiting factor in electrical circuits.

Resistance measures how much a material opposes the flow of electric current, and it is a fundamental component of 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.

Using Omega to denote resistance helps standardize communication in technical fields, making it universally understood among engineers and technicians around the world.