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Why should not the jockey be slided along the potentiometer wire?

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Why should not the jockey be slided along the potentiometer wire?
related to an answer for: Are Kirchhoff’s laws applicable for both AC and DC currents?

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Sliding the jockey on the potentiometer wire decreases the cross sectional area of the wire and thereby affects the fall of potential along the wire. This affects the potentiometer readings. Flence, the jockey should not be slided along the potentiometer wire.
asked Sep 25, 2022 in Chapter9:Current Electricity by (98.9k points)
edited Jun 29, 2023 Define Potential Gradient.

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