In a metre bridge, as shown in the figure, it is given that resistance and that balance is obtained at distance , from the end (by the jockey J) . After interchanging the resistances and , a new balance point is found at a distance from end . The values of and is

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8.16 Ω, 60.5 cm

9.16 Ω, 70.5 cm

7.16 Ω, 80.5 cm

2.16 Ω, 30.5 cm

answer is A.

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Detailed Solution

Concept- A device that utilises the Wheatstone bridge principle is referred to as a metre bridge, sometimes called a sliding wire bridge. A Wheatstone bridge, created in 1843 by William Wheatstone, is referred to as a metre bridge to characterise the erratic resistance of a conductor. Samuel Hunter Christie created the Wheatstone bridge. We may use the metre bridge formula to answer this query.

Hence, the correct option is 1.

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