Michigan Test for Teacher Certification (MTTC) Secondary Integrated Science Practice test

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Prepare for the Michigan Test for Teacher Certification (MTTC) Secondary Integrated Science exam. Utilize flashcards and multiple-choice questions with hints and explanations to succeed in your certification.

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Which instrument is used to measure electric current?

Voltmeter
Ampermeter
Ammeter
Galvanometer

The correct answer is: Ammeter

The ammeter is specifically designed to measure electric current in a circuit. It operates by being placed in series with the circuit, allowing it to measure the flow of charge through the circuit. Ammeters typically provide readings in amperes (A), which is the standard unit for electric current. While other instruments like voltmeters (which measure voltage) and galvanometers (which can detect the presence of current but not measure it directly in standard units) are related to electric measurements, they serve different primary purposes. A voltmeter measures the potential difference between two points, and a galvanometer can measure small currents but is generally a less precise tool for measuring current compared to an ammeter. Hence, the ammeter is the most suitable instrument for accurately measuring electric current.