What does a multimeter primarily measure?

A multimeter is primarily used to measure electrical values such as voltage, current, and resistance, making it an essential tool in electrical and electronic diagnostics. When measuring voltage, the multimeter can determine the potential difference between two points in a circuit. For current, it measures the flow of electric charge through a conductor, and when assessing resistance, it evaluates how much a material opposes the flow of electric current.

The versatility of the multimeter allows it to perform various functions, such as checking battery voltages, troubleshooting circuits, and verifying component values. This makes it a fundamental instrument for anyone working with or studying electrical systems.

While the other choices mention measurements that might be associated with different types of meters or instruments, they do not capture the primary functionalities of a multimeter. For instance, temperature and pressure measurements typically involve specialized sensors, while measuring magnetic fields and frequency usually requires dedicated devices such as gaussmeters or frequency counters. Therefore, the correct focus on voltage, current, and resistance reflects the essential capabilities of a multimeter.