What does a digital multimeter measure?

A digital multimeter is a versatile instrument that measures various electrical parameters, including both alternating current (AC) and direct current (DC) voltage. This capability makes it an essential tool for electricians, engineers, and technicians who need to assess different electrical conditions and troubleshoot various circuits.

AC voltage refers to the electrical voltage that alternates direction periodically, common in household power supplies. DC voltage, on the other hand, is constant and does not change direction, typically found in batteries and electronic devices. By being able to measure both types, a digital multimeter provides a comprehensive solution for evaluating various electrical systems and components, allowing for accurate diagnostics and assessments.

Other options, such as measuring only AC voltage or transient voltages, do not encompass the full capability of a digital multimeter. Additionally, while harmonic content can be analyzed with more specialized equipment like a spectrum analyzer or a power quality analyzer, it is not a standard function of a typical digital multimeter. Thus, the answer highlighting the multimeter’s ability to measure both AC and DC voltage correctly recognizes its primary functionalities.