What is the unit for measuring resistance?

Resistance is measured in Ohms, which is the standard unit in the International System of Units (SI). The concept of resistance relates to how much a material opposes the flow of electric current. According to Ohm's Law, resistance (R) can be quantified as the ratio of voltage (V) across a conductor to the current (I) flowing through it, expressed mathematically as R = V/I. Therefore, when evaluating the options, Ohms is distinctly associated with the measurement of resistance, making it the correct choice.

The other units mentioned have different associations: Volts are a measure of electric potential, Amperes refer to the flow of electric current, and Watts measure electrical power, which results from the product of voltage and current. Each of these units plays a crucial role in electrical calculations, but only Ohms specifically denotes resistance.