What is the primary function of a multimeter?

The primary function of a multimeter is to measure various electrical parameters, which includes voltage, current, and resistance. This versatility allows technicians to utilize the multimeter in a wide range of applications, from checking battery voltage to troubleshooting electrical circuits.

Measuring voltage helps determine if components are receiving the appropriate power, measuring current assists in understanding how much electricity is flowing through a circuit, and measuring resistance is essential for assessing the integrity of connections and components. This capability to analyze and diagnose electronic and electrical systems makes multimeters indispensable tools for both amateur and professional technicians.

Other options relate to functions that are not associated with a multimeter. For instance, amplifying signal strength or increasing current flow pertains to different types of equipment. Additionally, providing RF shielding is a protective characteristic related to preventing interference, not a measuring function.