Which Greek letter is used to represent resistance?

The Greek letter used to represent resistance is Omega. In the context of electronics and electrical engineering, resistance is measured in ohms, which is symbolized by the Greek letter Omega (Ω). This usage is derived from the naming conventions in physics and electrical theory, where each variable in equations is represented by specific symbols. Omega has become widely accepted in electrical terms, particularly in Ohm's Law, which relates voltage (V), current (I), and resistance (R) in the formula V = I × R. By using Omega, it provides a standard and universally recognizable representation of resistance, helping professionals communicate clearly about electrical characteristics in circuits.