NEET Physics Thermal Properties Of Matter MCQs

Two rods of identical dimensions but different materials, having linear expansion coefficients $\alpha_1$ and $\alpha_2$ ($\alpha_1 > \alpha_2$), are fixed at their ends and subjected to the same temperature increase. If the thermal stress developed in the rods are $\sigma_1$ and $\sigma_2$ respectively, which of the following is correct?

A metal rod of length 'L' is clamped rigidly at its midpoint. If its temperature is increased by $\Delta T$, the longitudinal strain developed in the rod is:

A metal rod of length $L$ at temperature $T_1$ is heated to a temperature $T_2$. If the linear expansivity of the metal is $\alpha$, the increase in length of the rod is given by:

Two rods of different materials but of the same length and cross-sectional area are heated through the same temperature difference. If their linear expansivities are $\alpha_1$ and $\alpha_2$ respectively, the difference in their elongation is:

A metal rod of length L is heated through a temperature $\Delta$T. If its coefficient of linear expansion is $\alpha$, the increase in length is:

A steel rod of length 1 m at 0°C is heated to 100°C. Given the coefficient of linear expansion of steel is $12 imes 10^{-6} K^{-1}$, what is the increase in its length?

The force which must be exerted to prevent a uniform rod of cross sectional area $2m{m^2}$ from expanding when it is heated from ${5^{\rm{o}}}C\,\,to\,\,{25^{\rm{o}}}C$  is

The force which must be exerted to prevent a uniform rod of cross sectional area $2m{m^2}$ from expanding when it is heated from ${5^{\rm{o}}}C\,\,to\,\,{25^{\rm{o}}}C$  is

A uniform pressure ‘P’ is exerted on all sides of a solid cube at temperature ${0^{\rm{o}}}C$ . In order to bring the volume of the cube to the original volume, the temperature of the cube must be increased by ${t^{\rm{o}}}C$ . If $\alpha$ is the linear coefficient and K be the bulk modulus of the material of the cube, then ‘t’ is equal to

A liquid of coefficient of cubical expansion $\gamma$ is filled in a container having coefficient of linear expansion $\frac{\gamma }{3}$. On heating, liquid level in the container will