Thermal Properties of Matter Test

Result

Thermal Properties of Matter Test - 76

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Weekly Quiz Competition

Question 1
4 / -1

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
9

B
2

C
6

D
1

Solution
Question 2
4 / -1

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

A
1 : 1

B

C

D

Solution
Question 3
4 / -1

A
1

B
1/2

C
2/3

D
1/3

Solution
Question 4
4 / -1

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

A

B

C

D

Solution
Question 5
4 / -1

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

A

B

C
0

D
None of these

Solution
Question 6
4 / -1

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

A

B

C

D

Solution
Question 7
4 / -1

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

A
T₁ > T₂ > T₃

B
T₁ > T₃ > T₂

C
T₂ > T₃ > T₁

D
T₃ > T₂ > T₁

Solution
Question 8
4 / -1

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

A
32000 K

B
16000 K

C
8000 K

D
4000 K

Solution
Question 9
4 / -1

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

A

B

C

D

Solution
Question 10
4 / -1

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

A
Sun – T₁, tungsten filament – T₂, welding arc – T₃

B
Sun – T₂, tungsten filament – T₁, welding arc – T₃

C
Sun – T₃, tungsten filament – T₁, welding arc – T₂

D
Sun – T₁, tungsten filament – T₃, welding arc – T₂