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Mechanical Properties of Solids — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsMechanical Properties of Solids1 Mark
MCQ
The stress - strain graphs for two materials are shown in $($assume same scale$).$
  1. Material $(ii)$ is more elastic than material $(i)$ and hence material $(ii)$ is more brittle.
  2. Material $(i)$ and $(ii)$ have the same elasticity and the same brittleness.
  3. Material $(ii)$ is elastic over a larger region of strain as compared to $(i).$
  4. Material $(ii)$ is more brittle than material $(i).$
  • A
    $a$ and $b$
  • B
    $b$ and $c$
  • ✓
    $c$ and $d$
  • D
    All of the above
✓

Answer

Correct option: C.
$c$ and $d$
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 $c).$
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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