What tool helps measure electrical resistance in components?

The tool that measures electrical resistance in components is the ohmmeter. This instrument is specifically designed to determine the resistance of an electrical circuit or component, typically expressed in ohms. When using an ohmmeter, it generates a small voltage that passes through the component being tested, allowing the device to compute how much the component resists the flow of electric current.

In contrast, a caliper is used for measuring dimensions, such as length and thickness. An amperemeter, on the other hand, measures electric current flowing through a circuit, while a thermometer is designed to measure temperature. Each of these tools serves a different purpose in electrical and mechanical maintenance, but the ohmmeter is uniquely suited for assessing resistance.