What is the symbol for electrical resistance?

The symbol for electrical resistance is represented by the letter "R." This designation is part of the fundamental principles of electrical engineering and is derived from Ohm's law, which relates voltage (V), current (I), and resistance (R) in a circuit through the equation V = I × R. In this context, resistance tells us how much a material opposes the flow of electric current within a circuit, measured in ohms (Ω).

This understanding is essential for analyzing and designing electrical systems, as it aids in calculating how much current will flow given a certain voltage and resistance level. The other letters represent different electrical quantities: voltage is denoted by "V," current by "I," and power by "P." Each of these symbols corresponds to specific aspects of electrical circuits, but "R" is unique in its representation of resistance.