Which instrument is used to measure resistance?

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Prepare for the MSSC Maintenance Awareness Test. Study with flashcards and multiple choice questions. Get ready for your exam with hints and detailed explanations!

Multiple Choice

Which instrument is used to measure resistance?

Explanation:
Measuring resistance involves determining how much a component opposes current flow. An ohmmeter is built specifically for this task: it applies a small known current (or voltage) through the component and measures the resulting voltage (or current), then uses Ohm’s law, R = V/I, to display the resistance. For accurate readings, power should be off and the component isolated from the circuit. Ammeters measure current, not resistance; voltmeters measure voltage; a multimeter is a versatile tool that can measure resistance (along with current and voltage), but the device dedicated to resistance measurement is the ohmmeter.

Measuring resistance involves determining how much a component opposes current flow. An ohmmeter is built specifically for this task: it applies a small known current (or voltage) through the component and measures the resulting voltage (or current), then uses Ohm’s law, R = V/I, to display the resistance. For accurate readings, power should be off and the component isolated from the circuit.

Ammeters measure current, not resistance; voltmeters measure voltage; a multimeter is a versatile tool that can measure resistance (along with current and voltage), but the device dedicated to resistance measurement is the ohmmeter.

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