Resistance is measured in a unit called?

Resistance is measured in a unit called Ohms. This unit is defined based on Ohm's Law, which states that the current (in Amperes) flowing through a conductor between two points is directly proportional to the voltage (in Volts) across the two points and inversely proportional to the resistance.

In this context, the unit of resistance (Ohm) quantifies how much a material opposes the flow of electric current. One Ohm is defined as the resistance that allows one Ampere of current to flow when a voltage of one Volt is applied across it. This fundamental relationship is crucial for understanding electrical circuits and plays an essential role in both theoretical and practical applications in electrical engineering and related fields.

The other choices listed—Volts, Amperes, and Watts—represent different electrical concepts: Volts measure electric potential, Amperes measure current, and Watts measure power. Each has its distinct meaning and cannot substitute for resistance, further emphasizing why Ohms is the correct choice for measuring resistance.