. During Searle’s experiment, zero of the Vernier scale lies between 3.20 × 10−2 m and 3.25 × 10-2 m of the main scale.


During Searle’s experiment, zero of the Vernier scale lies between 3.20 × 10−2 m and 3.25 × 10-2 m of the main scale. The 20th division of the Vernier scale exactly coincides with one of the main scale divisions. When an additional load of 2 kg is applied to the wire, the zero of the Vernier scale still lies between 3.20 × 10−2 m and 3.25 × 10−2 m of the main scale but now the 45th division of Vernier scale coincides with one of the main scale divisions. The length of the thin metallic wire is 2 m and its cross−sectional area is 8 × 10−7 m2. The least count of the Vernier scale is 1.0 × 10−5 m. The maximum percentage error in the Young’s modulus of the wire is

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During Searle’s

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