Thermodynamics Test

Result

Thermodynamics Test - 34

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Weekly Quiz Competition

Question 1
4 / -1

In the indicator diagram, Fig., AB is an isotherm and BC is an adiabat, because

A
AB and BC meet at B

B
BC is shorter than AB

C
Slope of AB is less than slope of BC

D
None of the above
Question 2
4 / -1

In Fig. two indicator diagrams are shown. If the amounts of work done in the two cases are W₁ and W₂ respectively, then

A
W₁ = W₂

B
W₁ > W₂

C
W₁ < W₂

D
cannot say
Question 3
4 / -1

A cyclic process is shown in Fig. Work done during isobaric expansion is

A
1600 J

B
100 J

C
400 J

D
600 J
Question 4
4 / -1

P – V plots for two gases during adiabatic processes are shown in Fig. Plots 1 and 2 should correspond respectively to

A
He and O₂

B
O₂ and He

C
He and Ar

D
O₂ and N₂

Solution
Question 5
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 emission of radiation. Find the correct relation between the emissine and adsorptive powers of the two bodies

A
E_x > E_y and a_x < a_y

B
E_x < E_y and a_x > a_y

C
E_x > E_y and a_x > a_y

D
E_x < E_y and a_x < a_y

Solution
Question 6
4 / -1

Which of the following PV diagrams best represents an isothermal process

A
A

B
B

C
C

D
D

Solution
Question 7
4 / -1

The temperature – entropy diagram of a reversible engine cycle is given in Fig. Its efficiency is

A

B

C

D

Solution
Question 8
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 Fig. 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.
Question 9
4 / -1

A black body has maximum wavelength λ_m at 2000 K. Its corresponding wavelength at 3000 K will be

A

B

C

D

Solution
Question 10
4 / -1

The graph AB Shown in figure is a plot of a temperature of a body in degree Fahrenhit than slope of line AB is

A

B

C

D

Solution