What tool can be used to test for voltage at a circuit?

A multimeter is an essential tool for testing voltage in a circuit because it is specifically designed to measure electrical parameters, including voltage, current, and resistance. When set to the appropriate mode, a multimeter can provide accurate voltage readings, allowing you to determine whether a circuit is energized, troubleshoot issues, and ensure the safe operation of electrical systems.

In contrast, tools such as screwdrivers, wrenches, and pliers serve mechanical purposes. A screwdriver is primarily used for inserting or removing screws, a wrench is designed for turning bolts and nuts, and pliers are used for gripping and manipulating objects. None of these tools have the capability to measure electrical voltage, making them unsuitable for this task.