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Mechanical Properties of Solids — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsMechanical Properties of Solids1 Mark
Question
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).
✓

Answer

  1. Material (ii) is elastic over a larger region of strain as compared to (i).
  2. Material (ii) is more brittle than material (i).

Explanation:

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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