Physics Thermodynamics questions from JEE Main 2009.
A long metallic bar is carrying heat from one of its ends to the other end under steady-state. The variation of temperature $\theta$ along the length $x$ of the bar from its hot end is best described by which of the following figure.
Assuming the gas to be ideal the work done on the gas in taking it from $A$ to $B$ is
One kg of a diatomic gas is at a pressure of $8 \times 10^4 \mathrm{~N} / \mathrm{m}^2$. The density of the gas is $4 \mathrm{~kg} / \mathrm{m}^{-3}$. What is the energy of the gas due to its thermal motion?
The net work done on the gas in the cycle ABCDA is
The work done on the gas in taking it from $D$ to $A$ is