What unit is used to measure electrical resistance?

The unit used to measure electrical resistance is the ohm. In electrical circuits, resistance determines how much current will flow for a given voltage, according to Ohm's Law, which states that voltage equals current times resistance (V = IR). Therefore, an understanding of resistance in terms of ohms is crucial for anyone working in fields related to electrical engineering or beauty therapy applications that use electrical equipment.

The other units listed have different roles in electrical systems: watts measure power (the rate of energy transfer), volts measure electrical potential or voltage, and amperes measure the flow of electric current. Each of these units plays a critical role in the overall understanding of electrical systems, but only ohms accurately quantify resistance.