In electrical terminology, what does 'R' denote?

In electrical terminology, 'R' denotes resistance. Resistance is a measure of the opposition to current flow in an electrical circuit. It is quantified in ohms (Ω) and is a fundamental concept in Ohm's Law, which states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor.

Resistance plays a crucial role in determining how much current will flow for a given voltage in a circuit. It impacts the performance of electronic devices and systems, influencing power dissipation, energy efficiency, and overall functionality. By understanding resistance, engineers can design circuits that work effectively and safely, ensuring that electrical components operate within their specified limits.