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General
Easy
Question
A ideal monoatomic gas is carried around the cycle ABCDA as shown in the fig. The efficiency of the gas cycle is
The correct answer is:
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physics-
Three processes form a thermodynamic cycle as shown on P-V diagram for an ideal gas Process 
takes place at constant temperature (300K) Process 
takes place at constant volume During this process 40J of heat leaves the system Process 3®1 is adiabatic and temperature T3 is 275K. Work done by the gas during the process 
is
Three processes form a thermodynamic cycle as shown on P-V diagram for an ideal gas Process takes place at constant temperature (300K) Process takes place at constant volume During this process 40J of heat leaves the system Process 3®1 is adiabatic and temperature T3 is 275K. Work done by the gas during the process is
physics-General
physics-
The figure, shows the graph of logarithmic reading of pressure and volume for two ideal gases A and B undergoing adiabatic process. From figure it can be concluded that
The figure, shows the graph of logarithmic reading of pressure and volume for two ideal gases A and B undergoing adiabatic process. From figure it can be concluded that
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physics-
An ideal gas is taken from point A to point C on P-V diagram through two process AOC and ABC as shown in the figure. Process AOC is isothermal
An ideal gas is taken from point A to point C on P-V diagram through two process AOC and ABC as shown in the figure. Process AOC is isothermal
physics-General
physics-
In the above thermodynamic process, the correct statement is
In the above thermodynamic process, the correct statement is
physics-General
physics-
An ideal gas undergoes the process as shown in the figure, the heat supplied and work done in the process is 
respectively. The ratio 
is
An ideal gas undergoes the process as shown in the figure, the heat supplied and work done in the process is respectively. The ratio is
physics-General
physics-
A given mass of a gas expands from a state A to the state B by three paths 1, 2 and 3 as shown in T-V indicator diagram. If W1 , W2 and W3 respectively be the work done by the gas along the three paths, then
A given mass of a gas expands from a state A to the state B by three paths 1, 2 and 3 as shown in T-V indicator diagram. If W1 , W2 and W3 respectively be the work done by the gas along the three paths, then
physics-General
physics-
Five particles have speeds 1, 2, 3, 4, 5 m/s. the average velocity of the particles is (in m/s)
Five particles have speeds 1, 2, 3, 4, 5 m/s. the average velocity of the particles is (in m/s)
physics-General
physics-
One mole of an ideal diatomic gas is taken through the cycle as shown in the figure.
1 → 2 : isochoric process
2 → 3 : straight line on P-V diagram
3 → 1 : isobaric process
The average molecular speed of the gas in the states 1, 2 and 3 are in the ratio
One mole of an ideal diatomic gas is taken through the cycle as shown in the figure.
1 → 2 : isochoric process
2 → 3 : straight line on P-V diagram
3 → 1 : isobaric process
The average molecular speed of the gas in the states 1, 2 and 3 are in the ratio
physics-General
physics-
The expansion of an ideal gas of mass m at a constant pressure P is given by the straight line B. Then the expansion of the same ideal gas of mass 2 m at a pressure 2P is given by the straight line
The expansion of an ideal gas of mass m at a constant pressure P is given by the straight line B. Then the expansion of the same ideal gas of mass 2 m at a pressure 2P is given by the straight line
physics-General
physics-
The process AB is shown in the diagram. As the gas is taken from A to B, its temperature
The process AB is shown in the diagram. As the gas is taken from A to B, its temperature
physics-General
physics-
An open and wide glass tube is immersed vertically in mercury in such a way that length 0.05 m extends above mercury level. The open end of the tube is closed and the tube is raised further by 0.43 m. The length of air column above mercury level in the tube will be : Take Patm = 76 cm of mercury
An open and wide glass tube is immersed vertically in mercury in such a way that length 0.05 m extends above mercury level. The open end of the tube is closed and the tube is raised further by 0.43 m. The length of air column above mercury level in the tube will be : Take Patm = 76 cm of mercury
physics-General
physics-
An ideal gas is trapped inside a test tube of cross-sectional area 
as shown in the figure. The gas occupies a height L1 at the bottom of the tube and is separated from air at atmospheric pressure by a mercury column of mass 0.002 kg. If the tube is quickly turned isothermally, upside down so that mercury column encloses the gas from below. The gas now occupies height L1 in the tube. The ratio 
is [Take atmospheric pressure = 
]
An ideal gas is trapped inside a test tube of cross-sectional area as shown in the figure. The gas occupies a height L1 at the bottom of the tube and is separated from air at atmospheric pressure by a mercury column of mass 0.002 kg. If the tube is quickly turned isothermally, upside down so that mercury column encloses the gas from below. The gas now occupies height L1 in the tube. The ratio is [Take atmospheric pressure = ]
physics-General
physics-
An ideal gas undergoes a thermodynamics cycle as shown in figure. Which of the following graphs represents the same cycle?
An ideal gas undergoes a thermodynamics cycle as shown in figure. Which of the following graphs represents the same cycle?
physics-General
physics-
A cylindrical tube of cross-sectional area A has two air tight frictionless pistons at its two ends. The pistons are tied with a straight two ends. The pistons are tied with a straight piece of metallic wire. The tube contains a gas at atmospheric pressure P0 and temperature T0 If temperature of the gas is doubled then the tension in the wire is
A cylindrical tube of cross-sectional area A has two air tight frictionless pistons at its two ends. The pistons are tied with a straight two ends. The pistons are tied with a straight piece of metallic wire. The tube contains a gas at atmospheric pressure P0 and temperature T0 If temperature of the gas is doubled then the tension in the wire is
physics-General
physics-
PV curve for the process whose VT curve is
PV curve for the process whose VT curve is
physics-General
