What can a multimeter measure?

A multimeter is a versatile tool that is commonly used in electrical measurements. It can measure voltage, current, and resistance, which are fundamental electrical parameters.

When measuring voltage, a multimeter can indicate the potential difference across two points in an electrical circuit, whether it is AC or DC voltage. When measuring current, the multimeter provides insights into how much electric charge flows through a circuit over time, again applicable for both AC and DC. For resistance measurements, the multimeter evaluates the opposition to the flow of electric current in a circuit component, helping diagnose issues such as short circuits or faulty components.

The capability to measure these three parameters effectively makes a multimeter an essential tool for electricians and engineers. While some multimeters can also measure additional parameters like capacitance, frequency, and temperature, the core functions remain focused on voltage, current, and resistance. The correctness of this answer lies in its reflection of these primary functions that are standard across most multimeter designs.