What does 'R' represent in electrical formulas?

In electrical formulas, 'R' specifically represents resistance, which is measured in ohms (Ω). Resistance quantifies how strongly a material opposes the flow of electric current, which is a crucial concept in understanding circuit behavior. This is particularly significant in Ohm's Law, where the relationship between voltage (V), current (I), and resistance (R) is defined as V = I × R.

Resistance is an essential parameter for calculating power dissipation in circuits, analyzing the performance of electronic components, and designing systems to ensure they operate safely and effectively without overheating or failing. Understanding the role of resistance also helps in troubleshooting issues within electrical circuits, as high resistance can indicate potential problems such as damaged components or inefficient connections.