Wire of different radii are used in Searle’s experiment for measuring elasticity properties of a given material. In stress v/s strain graph, on using wire of larger radius. (Length of the wire remains constant)
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In Searle's experiment, stress is force per unit area (σ = F/A) and strain is extension per unit length (ε = ΔL/L). For a constant force F and length L, stress depends on cross-sectional area A = πr². A larger radius wire has larger A, so stress σ decreases for the same force.
The stress-strain graph is a straight line with slope = Young's modulus (Y = σ/ε). Since Y is a material constant, the slope remains unchanged. However, for the same strain, lower stress means the line rotates clockwise about the origin.
Final answer: line will rotate clockwise