Home

Theory For Notes Making

Objective Assignment

Subjective Assignment

On Line Test

Video Lecture

Theory For Notes Making

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

Objective Assignment

1.

A Carnot engine is working between 127°C and 27°C. The increase in efficiency will be maximum when the temperature of

(a)      the source is increased  by 50°C

(b)      the sink is decreased by 50°C

(c)     source is increased by 25°C and that of sink is decreased by 25°C

(d)      both source and sink are decreased by 25°C each

Ans (b)

2.

Three moles of an ideal monoatomic gas undergoes the process ABCDA as shown, where {{T}_{A}}\ =\ 300K, {{T}_{B}}\ =\ 600K,  {{T}_{c}}\ =\ 1800\ Kand {{T}_{D}}\ =\ 900\ K. Find the work done by the gas during the cycle.

(a) 17.8 kJ                                       

(b) 14.9 kJ

(c) 19.9 kJ                                       

(d) 21.1 kJ

Ans (b)

3.

A thermo dynamical system goes from state (i) {{P}_{1}},\,Vto 2{{P}_{1}},\,V (ii) P, V to P, 2V. Then work done in the two cases is

(a)   zero, zero                              

(b)   zero, PV

(c)    P{{V}_{1}}, zero     

(d)   P{{V}_{1}}, {{P}_{1}}{{V}_{1}}

Ans(b)

4.

An ideal gas is taken through series of changes represented in fig. The net work done by the gas at the end of the cycle is equal to

(a) {{P}_{1}}{{V}_{1}}    

(b) 3{{P}_{1}}{{V}_{1}}  

(c) 6{{P}_{1}}{{V}_{1}}  

(d) 12{{P}_{1}}{{V}_{1}}

Ans (d)

5.

Heat energy absorbed by a system in going through a cyclic process shown in figure is

(a)      {{10}^{7}}\pi J       

(b)      {{10}^{4}}\pi J

(c)       {{10}^{2}}\pi J       

(d)      {{10}^{{-3}}}\pi J

Ans (c)

6.

An ideal gas is taken through the cycle A→B→C→A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C→A is

(a)  –5 J    

(b)  –10 J

(c)  –15J   

(d) –20 J

Ans(a)

Subjective Assignment

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

QUIZ

1
Created on By physicscart

Various Thermodynamics Cycles (Basic Level)

1 / 10

Boiling water is changing into stream. Under this condition, the specific heat of water is

2 / 10

A balloon is filled with hydrogen at a given pressure at 20ºC. What fraction of gas will escape out of the balloon if the temperature rises to 40ºC at constant pressure ?

3 / 10

It is required to double the pressure of a gas in a container at 27ºC by heating it. To what temperature the gas should be raised

4 / 10

If the volume of air at 0ºC and 10 atmospheric pressure is 10 litre, its volume, in litre, at normal temperature and pressure would

5 / 10

A vessel of volume 0.1 m^3  containing air at a pressure of 76 cm of Hg is connected to an evacuated vessel of capacity 0.09 m^3. What is the resultant air pressure if temperature is assumed to remain constant ?

6 / 10

We have a jar A filled with gas characterised by parameters P, V and T and another jar B filled with a gas with parameters 2P, V/4 and 2T, where the symbols have the usual meanings. The ratio of the number of molecules in jar A to those in jar B is

7 / 10

The volume of a vessel A is twice the volume of another vessel B, and both of them are filled with the same gas.

If the gas in A is at twice the temperature and twice the pressure in comparison to the gas in B, then the ratio of the gas molecules in A and B is

8 / 10

When the temperature of a gas is raised from 27ºC to 90ºC, the percentage increase in the r.m.s. velocity of the molecules will be

9 / 10

A mixture of helium and hydrogen gases is filled in a vessel at 30ºC. The r.m.s. velocities of helium and hydrogen molecules are in the ratio

10 / 10

A monoatomic gas (\gamma =5/3) is suddenly compressed to \frac{1}{8} of its original volume adiabatically, then the pressure of the gas will change to

Your score is

The average score is 0%

LinkedIn Facebook VKontakte
0%