| Column $-I$ | Column $-II$ |
| $(a)$ When temperature raised Young’s modulus of body | $(i)$ Zero |
| $(b)$ Young’s modulus for air | $(ii)$ Infinite |
| $(iii)$ Decreases | |
| $(iv)$Increases |
[Area of cross section of wire $=0.005 \mathrm{~cm}^2$, $\mathrm{Y}=2 \times 10^{11}\ \mathrm{Nm}^{-2}$ and $\left.\mathrm{g}=10 \mathrm{~ms}^{-2}\right]$
| Column $-I$ | Column $-II$ |
|
$(a)$ Stress is proportional to strain. |
$(i)$ Elastic limit |
| $(b)$ When the load of the wire is removed, the body does regain its original dimension. | $(ii)$ Limit of pro-portionality |
| $(iii)$ Plastic deformation |
