What is the unit used to measure electrical resistance?

The unit used to measure electrical resistance is the ohm. In electrical terms, resistance refers to the opposition that a substance offers to the flow of electric current. The concept is crucial in understanding how electrical circuits operate.

Ohm's law, which states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance, further solidifies the role of ohms in electricity. The relationship among resistance (in ohms), voltage (in volts), and current (in amperes) is fundamental for anyone working with electrical systems, making the ohm a key unit in the field of electricity and electronics.

In contrast, watts measure power (the rate of energy transfer), volts measure electric potential difference, and amperes measure the flow of electric current. Each of these units has its own specific application and relation to electricity, but none of them quantify resistance. This clarity helps in understanding their distinct functions in electrical concepts.