Which instrument is used to measure resistance?

Study for the MTA Electrical Test. Use our flashcards and multiple choice questions to prepare, each question includes hints and explanations. Achieve success on your exam!

Multiple Choice

Which instrument is used to measure resistance?

Explanation:
Measuring resistance relies on applying a known stimulus and observing the response so you can compute R = V / I. An ohmmeter is built for this task: it contains a small internal source and a meter, and when you connect it across a component, it drives a current through and reads the resulting response to show the resistance directly. This is different from a voltmeter, which only measures voltage, and an ammeter, which only measures current. A megger is a specialized device used to check insulation resistance at higher voltages, not the typical resistance of a component in a circuit. So, for direct resistance measurement, the instrument designed for that purpose is the ohmmeter.

Measuring resistance relies on applying a known stimulus and observing the response so you can compute R = V / I. An ohmmeter is built for this task: it contains a small internal source and a meter, and when you connect it across a component, it drives a current through and reads the resulting response to show the resistance directly. This is different from a voltmeter, which only measures voltage, and an ammeter, which only measures current. A megger is a specialized device used to check insulation resistance at higher voltages, not the typical resistance of a component in a circuit. So, for direct resistance measurement, the instrument designed for that purpose is the ohmmeter.

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