An ohmmeter is used to measure what?

An ohmmeter is specifically designed to measure resistance in electrical circuits. When you connect an ohmmeter across two points in a circuit, it applies a small voltage and measures the current flowing through the resistance. By using Ohm’s law (V = IR), the device can calculate the resistance based on the voltage applied and the current that flows.

In contrast, voltage is measured with a voltmeter, current is measured with an ammeter, and power is calculated based on both voltage and current (using formulas such as P = VI for direct current circuits). This distinction highlights the unique functionality of the ohmmeter in measuring resistance rather than any other electrical properties.