The stress-strain graphs for two materials are shown in Fig. (assume same scale).

Engineering

Physics

Stress Strain and Hookes Law New

Question

Material (ii) is elastic over a larger region of strain as compared to (i).

Material (i) and (ii) have the same elasticity and the same brittleness.

Material (ii) is more elastic than material (i) and hence material (ii) is more brittle.

Material (ii) is more brittle than material (i).

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The stress-strain graph shows material (i) has a longer linear elastic region and higher fracture strain, indicating ductility. Material (ii) has a shorter elastic region and fractures abruptly at lower strain, indicating brittleness. Elasticity is similar as both have steep initial slopes, but brittleness differs.

Final answer: Material (ii) is more brittle than material (i).