Thermal Propert...

A metal rod AB of length 10x has its one end A in ice at 0^oC and the other end B in water at 100^oC. If a point P on the rod is maintained at 400^oC, then it is found that equal amounts of water and ice evaporate and melt per unit time. The latent heat of evaporation of water is 540 cal/g and latent heat of melting of ice is 80 cal/g. If the point P is at a distance of λx from the ice end A, find the value of λ.
[Neglect any heat loss to the surrounding].

A sphere and a cube of same material and same volume are heated upto same temperature and allowed to cool in the same surrounding. The ratio of the amounts of radiations emitted will be

The figure shows a system of two concentric spheres of radii r₁ and r₁ and kept at temperatures T₁ and T₂, respectively. The radial rate of flow of heat in a substance between the two concentric spheres is proportional to

Four rods of identical cross-sectional area and made from the same metal form the sides of square. The temperature of two diagonally opposite points are T and √2T respectively in the steady state. Assuming that only heat conduction takes place, what will be the temperature difference between other two points

The graph shown in the adjacent diagram, represents the variation of temperature (T) of two bodies, x and y having same surface area, with time (t) due to the emission of radiation. Find the correct relation between the emissivity (e) and absorptivity (a) of the two bodies

The plots of intensity versus wavelength for three black bodies at temperatures T₁, T₂ and T₃ respectively are as shown. Their temperature are such that

The adjoining diagram shows the spectral energy density distribution E_λ of a black at two different temperatures. If the areas under the curves are in the ratio 16 : 1, the value of temperature T is

Following graph shows the correct variation in intensity of heat radiations by black body and frequency at a fixed temperature

Variation of radiant energy emitted by sun, filament of tungsten lamp and welding arc as a function of its wavelength is shown in figures. Which of the following option is the correct match