What is the correct setting on a meter for measuring alternating current voltage (VAC)?

The correct setting for measuring alternating current voltage (VAC) on a meter is AC. This setting specifically allows the meter to accurately read the voltage when it fluctuates in polarity, which is the characteristic of alternating current.

Selecting the right function on a meter is crucial because using the wrong setting can lead to inaccurate readings or even potentially damage the meter. AC voltage is measured in volts (VAC), and when using a multimeter, you must set it to the AC setting to measure voltage from sources like outlets or power supplies that provide alternating current.

The other settings on the meter serve different purposes: DC is for measuring direct current, V is a generic indicator for voltage but does not specify AC, and Ohm is for measuring resistance in a circuit. Therefore, selecting the AC setting ensures that the measuring equipment can properly interpret the fluctuating voltages typical in AC applications.