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MHT CET 2023 (10 May, Shift 2) · Wheatstone Bridge & Metre Bridge

Wheatstone Bridge & Metre Bridge question from MHT CET 2023 (10 May, Shift 2)

Q43MHT CET 2023 · 10 MAY · SHIFT 2Medium

Wheatstone Bridge & Metre Bridge

In meter bridge experiment, null point was obtained at a distance ' $l$ ' from left end. The values of resistances in the left and right gap are doubled and then interchanged. The new position of the null point is

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Answer: (a)

Initially $\dfrac{R_1}{R_2} = \dfrac{l}{100 - l}$
New: left $2R_2$ , right $2R_1$ : $\dfrac{l'}{100 - l'} = \dfrac{R_2}{R_1} = \dfrac{100 - l}{l}$
$l' = 100 - l$
So the answer is (a) $(100 - l)$ .

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