Which instrument is used to measure electrical resistance?

The instrument used to measure electrical resistance is the ohmmeter. This tool specifically quantifies how much opposition a material offers to the flow of electric current. The measurement is given in ohms, which is the standard unit of resistance. When using an ohmmeter, a small current is passed through the resistor or component being tested, and the device calculates resistance based on the amount of current that flows.

Capacitors and inductors are components used in electrical circuits for specific purposes; capacitors store electrical energy temporarily, and inductors store energy in a magnetic field. Neither of these can measure resistance.

The voltmeter, on the other hand, is used to measure voltage or electrical potential difference across two points in a circuit, not resistance. Thus, the ohmmeter is the definitive choice for measuring electrical resistance in various components and circuits.