NEET UG 2009 — Thermodynamics

The internal energy change in a system that has absorbed $2 \mathrm{k}$ cal of heat and done $500 \mathrm{~J}$ of work is :

In thermodynamic processes which of the following statements is not true?

The two ends of a rod of length $L$ and a uniform cross-sectional area $A$ are kept at two temperatures $\mathrm{T}_1$ and $\mathrm{T}_2\left(\mathrm{~T}_1>\mathrm{T}_2\right)$. The rate of heat transfer, $\frac{\mathrm{dQ}}{\mathrm{dt}}$, through the rod in a steady state is given by

A black body at $227^{\circ} \mathrm{C}$ radiates heat at the rate of $7 \mathrm{cal} \mathrm{cm}^{-2} \mathrm{~s}^{-1}$. At a temperature of $727^{\circ} \mathrm{C}$, the rate of heat radiated in the same units will be

The two ends of a rod of length $\mathrm{L}$ and a uniform cross-sectional area A are kept at two temperatures $T_1$ and $T_2\left(T_1>T_2\right)$. The rate of heat transfer, $\frac{\mathrm{dQ}}{\mathrm{dt}}$, through the rod in a steady state is given by :

The internal energy change in a system that has absorbed $2 \mathrm{kcal}$ of heat and done $500 \mathrm{~J}$ of work is

A black body at $227^{\circ} \mathrm{C}$ radiates heat at the rate of $7 \mathrm{cals} / \mathrm{cm}^2 \mathrm{~s}$. At a temperature of $727^{\circ} \mathrm{C}$, the rate of heat radiated in the same units will be :

In thermodynamic processes which of the following statements is not true?