Which of the following tools is commonly used to measure current in electrical circuits?

The ampermeter, also known as an ammeter, is specifically designed to measure current in electrical circuits. This tool is essential for determining the flow of electric charge, measured in amperes (A). In a typical setup, an ammeter is connected in series with the circuit component whose current is being measured. This allows it to provide an accurate reading of the current flowing through the circuit at that point.

Understanding the distinction between different electrical measurement tools is crucial. For example, a voltmeter measures voltage across two points in a circuit and is connected in parallel, while a wattmeter measures power in watts and requires specific configurations to provide accurate readings. An oscilloscope displays voltage signals over time and is often used to analyze the waveform of an electrical signal but does not directly measure current. Hence, the ampermeter stands out as the correct tool for measuring current in electrical circuits.