JEE (Advanced) 2012 Paper-1 Question 4

Question 4

In the determination of Young’s modulus $$\left(Y = \frac{4MLg}{\pi l d^2}\right)$$ by using Searle’s method,a wire of length L=2 mand diameter d=0.5 mmis used. For a load M= 2.5 kg, an extension l = 0.25 mm in the length of the wire is observed. Quantities d and/ are measured using a screw gauge and a micrometer, respectively. They have the same pitch of 0.5 mm. The number ofdivisions on their circular scale is 100. The contributions to the maximum probable error of the Y measurement

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