G L Mittal and TARUN MITTAL Solutions for Chapter: Thermal Conduction, Exercise 3: FOR DIFFERENT COMPETITIVE EXAMINATIONS

In the steady state, the temperature of a rod:

The rate of heat conduction perpendicular to the surface of a flat plate depends upon:

Which of the following cylindrical rods of the same metal and having same temperature-difference between their ends will conduct heat at the highest rate?

A composite block is made of slabs $A$, $B$, $C$, $D$ and $E$ of different thermal conductivities (given in terms of a constant $K$) and sizes (given in terms of length, $L$) as shown in the figure. All slabs are of same width. Heat $Q$ flows only from left to right through the blocks. Then, in steady state:

While measuring the thermal conductivity of a liquid, we keep the upper part hot and the lower part cold, because :

It is hotter at the same distance over the top of a fire than it is on the side of it, mainly because :

In which of the following processes, convection of heat does not take place?

Two rectangular blocks, having identical dimensions, can be arranged either in configuration $\left(i\right)$ or in configuration $\left(ii\right)$, as shown in the figure. One of the blocks has thermal conductivity $K$ and the other $2K$. The temperature difference between the ends along the $X$ axis is the same in both the configurations. It takes $9 s$ to transport a certain amount of heat from the hot end to the cold end in the configuration $\left(i\right)$. The time to transport the same amount of heat in the configuration $\left(ii\right)$ is: