Mechanical Properties of Solids Physics - Mechanical Properties of Solids

• A
  Infinity.
• ✓
  Zero.
• C
  Unity.
• D
  Some finite small non - zero constant value.

Answer: B.

A mild steel wire of length $2L$ and cross $-$ sectional area $A$ isstretched, well within elastic limit, horizontally between two pillars. A mass $m$ is suspended from the mid point of the wire.Strain in the wire is

• ✓
  $\frac{\text{x}^2}{2\text{L}^2}$
• B
  $\frac{\text{x}}{\text{L}}$
• C
  $\frac{\text{x}^2}{\text{L}}$
• D
  $\frac{\text{x}^2}{\text{2L}}$

Answer: A.

• A
  Volumetric.
• B
  Shear.
• ✓
  Longitudinal and shear.
• D
  Longitudinal.

Answer: C.

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: C.

• A
  Be double.
• B
  Be half.
• C
  Be four times.
• ✓
  Remain same.

Answer: D.