What does a multimeter measure?

A multimeter is a versatile instrument designed to measure multiple electrical properties. The primary functions it can perform include measuring voltage (the potential difference between two points in an electrical circuit), current (the flow of electrical charge), and resistance (the opposition to the flow of current in a circuit).

This combination of measurements makes the multimeter an essential tool for electricians and technicians, as it allows them to diagnose problems in electrical circuits, ensure devices are functioning correctly, and verify that circuits are safe to work on. The capability to measure these three fundamental electrical quantities is why the first option accurately describes what a multimeter can measure.

The other options suggest measurements that are either more specialized or outside the typical functions of a standard multimeter. For example, power and frequency are related to different aspects of electrical systems and are typically measured with more specialized equipment. Similarly, temperature is not a primary function of a standard multimeter, although some multimeters can measure temperature if equipped with the appropriate probes.