Prior to using an analog multimeter set up...

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Question 1 of 205eccefa3bacbc34ba4d47f59

Prior to using an analog multimeter set up as an ohmmeter, the leads are purposely shorted together. Which of the following actions should be taken if, when adjusting to "zero" ohms, the indicating needle cannot be returned to "zero" on the scale?

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🔍 Key Concepts

• Internal battery in an analog ohmmeter and what it does • Purpose of the zero-ohms adjustment before measuring resistance • What it means when the needle cannot be brought to zero with the adjust knob

💭 Think About

• Think about what an ohmmeter is actually doing when the leads are shorted together. What condition is it trying to simulate inside the meter? • If the mechanical parts and leads are fine but the needle still won’t reach zero, what inside the meter might no longer be providing enough energy? • Which option describes something that would affect every resistance reading in the same way, rather than just a one-time correction?

✅ Before You Answer

• Verify that shorted leads should always indicate zero ohms if the meter is working correctly. • Consider whether adding or subtracting a fixed value from each reading would really fix a non-zero zero problem on the ohms scale. • Think about how a weak or dead meter battery would affect the ability to reach full-scale (zero-ohms) deflection.

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