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Class XI Physics Thermodynamics 4
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Question 1
An engine operates by taking n moles of an ideal gas through the cycle ABCDA shown in figure. The thermal efficiency of the engine is:
(Take Cv=1.5 R, where R is gas constant)
(Take Cv=1.5 R, where R is gas constant)
Question 2
The pressure and density of a diatomic gas of constant mass (γ = 7/5) changes adiabatically from (P, ρ) to (P ´, ρ ´) if ρ ´/ρ = 32 then P'/P should be
Question 3
A fixed mass of an ideal gas undergoes the change represented by 
below (shown in figure) Which one of the following sets could describe this of changes?
Which one of the following sets could describe this set of changes?
below (shown in figure) Which one of the following sets could describe this of changes? Which one of the following sets could describe this set of changes?
Question 4
One mole of an ideal gas with heat capacity at constant pressure CP undergoes the process T = T 0 + αV where T0 and α are constants and the volume increases from V1 to V2, the amount of heat transferred to the gas is –
Question 5
‘n’ moles of an ideal gas undergoes a process 
as shown in the figure. The maximum temperature of the gas during the process will be
as shown in the figure. The maximum temperature of the gas during the process will be Question 6
“Heat cannot by itself flow from a body at lower temperature to a body at higher temperature” is a statement of consequence of
Question 7
A process for ideal gas at initial temperature T0, pressure P0 and Volume V0 is compressed with constant pressure to have original volume as shown in figure calculate the heat supplied to the gas.
Question 8
For a given mass of a gas, the P-V graph for isothermal variations at temperatures T1 and T2 (kelvin) are shown in figure. Then,
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Feb 26JEE & BITSAT
