Certified Energy Auditor Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

An ammeter is specifically designed to measure the quantity of electric current flowing through a circuit. The unit of measurement for this current is amperes (A). When connected in series with a circuit, the ammeter can accurately gauge how much electric charge is passing through it over time, providing valuable data for understanding and analyzing electrical systems.

In contrast, measuring voltage requires a different instrument known as a voltmeter, which is connected in parallel to the circuit. Assessing resistance involves the use of an ohmmeter or a multimeter set to the resistance measurement mode, which operates under a different principle. Finally, detecting electromagnetic fields typically involves specialized devices such as gaussmeters or EMF meters, not an ammeter. Thus, the functionality of an ammeter is clearly defined and distinct from the tasks performed by these other instruments.