ARRL Technician Practice Exam

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Prepare for the ARRL Technician Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

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Which instrument is used to measure electric current?

An ammeter
An ohmmeter
A voltmeter
A multimeter

The correct answer is: An ammeter

An ammeter is specifically designed to measure electric current flowing through a circuit. It is connected in series with the circuit, allowing it to accurately gauge the amount of current, typically expressed in amperes (A). This specialized function distinguishes it from other instruments, which serve different purposes. An ohmmeter measures resistance in ohms, while a voltmeter measures voltage between two points in a circuit. A multimeter, however, is a versatile tool that can measure current, voltage, and resistance, but it encompasses a broader range of functions. While the multimeter can perform the same task as an ammeter when configured correctly, the ammeter remains the dedicated instrument solely for measuring electric current.