What can a multimeter measure in an electrical circuit?

A multimeter is a versatile instrument that can measure various electrical parameters in a circuit. The correct answer, which indicates that it can measure both current flow and voltage, highlights the fundamental functionality of this tool.

In more detail, a multimeter typically has several settings and can be switched to measure direct current (DC) and alternating current (AC) for current flow, as well as various voltage levels in both AC and DC forms. This capability comes from its design, which includes features that allow it to analyze and provide values for voltage (the potential difference between two points) as well as current (the flow of electric charge).

By being able to measure both parameters, the multimeter assists technicians and engineers in diagnosing electrical issues, verifying circuit operations, and performing maintenance. This dual-functionality is essential for comprehensive electrical testing, allowing for more efficient troubleshooting compared to tools that measure only one aspect of an electrical circuit.

Other options suggest limitations in the multimeter's capabilities, which do not reflect its true versatility. By using a multimeter, technicians can get a holistic view of an electrical circuit's functionality through both current and voltage readings, leading to more informed decisions during installation and maintenance.