Which instrument is used to measure resistance?

The instrument used to measure resistance is the ohmmeter. An ohmmeter specifically tests the electrical resistance of a component or circuit and provides a direct reading of this value in ohms. This measurement is crucial when assessing whether a resistor is functioning correctly or when troubleshooting electrical faults in circuits.

While multimeters can also measure resistance, they are versatile devices that combine multiple functions, such as measuring voltage, current, and resistance, but the primary tool dedicated solely to measuring resistance is the ohmmeter. In contrast, a voltmeter measures voltage and an ammeter measures current, making both unsuitable for directly measuring resistance.