What is the primary function of a multimeter?

The primary function of a multimeter is to measure voltage, current, and resistance. This versatile instrument allows electricians and technicians to troubleshoot and diagnose electrical problems by providing accurate readings of these essential parameters.

Voltage measurement helps determine if a circuit is receiving a proper supply of power, current measurement indicates how much electricity is flowing through a circuit, and resistance measurement is crucial for assessing the integrity of components within a circuit. By combining these three functions, a multimeter can effectively aid in verifying whether electrical systems are functioning correctly, ensuring safety and efficiency in electrical work.

The other options do not align with the multimeter's primary abilities. Generating electrical signals or converting AC to DC are tasks performed by other specialized equipment, while testing circuit durability typically requires different tools to assess physical conditions rather than electrical characteristics.