Which device is used to measure electrical current?

• A. Voltmeter
• B. Ammeter
• C. Ohmmeter
• D. Multimeter

Answer: (B)

The device that is specifically designed to measure electrical current is the ammeter. An ammeter is connected in series with the circuit and provides a direct reading of the current flowing through it, typically measured in amperes (A). This capability makes it essential for troubleshooting and ensuring that electrical systems operate within their intended current levels.

While a voltmeter measures the voltage across a component and an ohmmeter measures resistance, the ammeter's function is solely focused on current measurement. A multimeter can indeed measure current, voltage, and resistance, but it needs to be set to the correct mode to do so; its versatility is broader compared to the specialized function of an ammeter. Thus, for direct current measurement, the ammeter is the most appropriate choice.