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MHT CET 2021 (20 Sep, Shift 2) · Potentiometer

Potentiometer question from MHT CET 2021 (20 Sep, Shift 2)

Q62MHT CET 2021 · 20 SEP · SHIFT 2Medium

Potentiometer

In potentiometer experiment, null point is obtained at a particular point for a cell on potentiometer wire ' $\mathrm{x}$ ' cm long. If length of potentiometer wire is increased by few centimeter without changing the cell, the balancing length will [Driving source is not changed]

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Answer: (b)

Same driver, so a longer wire gives a smaller gradient $k = \dfrac{V}{L}$ .
Balancing length $l = \dfrac{E}{k}$ increases.
So the answer is (b) increase.

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