What is the unit of electrical resistance?

The unit of electrical resistance is the Ohm, represented by the symbol Ω. Resistance quantifies how much a component resists the flow of electric current. According to Ohm's Law, which states that voltage (V) equals current (I) times resistance (R), we can see that resistance directly links voltage and current in a circuit. Understanding this relationship is fundamental in electrical studies, as it enables the calculation of how components will behave under various electrical conditions.

The other units mentioned refer to different electrical properties: the Coulomb measures electric charge, the Volt measures electric potential difference (voltage), and the Watt measures electrical power, which is the rate of energy transfer. Each of these units serves a distinct role in the study of electricity, but are not used to measure resistance. Hence, the Ohm is the appropriate and correct unit for electrical resistance.