The stress - strain graphs for two materials are shown in (assume… - Vidyadip

MCQ

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

A
Material $(ii)$ is more elastic than material $(i)$ and hence material $(ii)$ is more brittle.
B
Material $(ii)$ is more brittle than material $(i).$
C
Material $(ii)$ is elastic over a larger region of strain as compared to $(i).$
✓
$B$ and $C$

✓

Answer

Correct option: D.

$B$ and $C$

On comparing ultimate tensile strength of the materials, $(ii)$ is greater than $(i).$
Hence, material $(ii)$ is elastic over larger region as compare to $(i)$ so the material $(ii)$ is elastic over a larger region of strain as compared to $(i) ($verifies option $b).$
As the fracture point of material $(ii)$ is nearer than $(i),$ hence the material $(ii)$ is more brittle than material $(i).$

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