JEE Advanced · Physics · 13. Thermodynamics
The figure shows the \(p-V\) plot of an ideal gas taken through a cycle \(A B C D A\). The part \(A B C\) is a semi-circle and \(C D A\) is half of an ellipse. Then,
- A the process during the path \(A \rightarrow B\) is isothermal
- B heat flows out of the gas during the path \(B \rightarrow C \rightarrow D\)
- C work done during the path \(A \rightarrow B \rightarrow C\) is zero
- D positive work is done by the gas in the cycle \(A B C D A\).
Answer & Solution
Correct Answer
(D) positive work is done by the gas in the cycle \(A B C D A\).
Step-by-step Solution
Detailed explanation
(A) \(p-V\) graph is not rectangular hyperbola. Therefore, process \(A-B\) is not isothermal.
(B) In process \(B C D\), product of \(p V\) (therefore temperature and intemal energy) is decreasing. Further, volume is decreasing. Hence, work done is also negative. Hence, \(Q\) will be negative or heat will flow out of the gas.
(C) \(W_{A B C}=\) positive
(D) For clockwise cycle on \(p-V\) diagram with \(P\) on \(y\)-axis, net work done is positive.
(B) In process \(B C D\), product of \(p V\) (therefore temperature and intemal energy) is decreasing. Further, volume is decreasing. Hence, work done is also negative. Hence, \(Q\) will be negative or heat will flow out of the gas.
(C) \(W_{A B C}=\) positive
(D) For clockwise cycle on \(p-V\) diagram with \(P\) on \(y\)-axis, net work done is positive.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- The dimensions of a cone are measured using a scale with a least count of \(2 \mathrm{~mm}\). The diameter of the base and the height are both measured to be \(20.0 \mathrm{~cm}\). The maximum percentage error in the determination of the volume is _______ .JEE Advanced 2024 Easy
- In the circuit shown, initially there is no charge on capacitors and keys and are open. The values of the capacitors are and
Which of the statement(s) is/are correct?JEE Advanced 2019 Hard - A rectangular conducting loop of length and width is in the -plane, as shown in the figure. It is being moved away from a thin and long conducting wire along the direction with a constant speed . The wire is carrying a steady current in the positive -direction. A current of flows through the loop when it is at a distance from the wire. If the resistance of the loop is , then the value of is _____ .
[Given: The permeability of free space ]
JEE Advanced 2023 Medium - In plotting stress versus strain curves for two materials \(P\) and \(Q\), a student by mistake puts strain on the \(y\)-axis and stress on the \(x\)-axis as shown in the figure. Then the correct statement(s) is(are)
JEE Advanced 2015 Medium - Which of the following statement is correct in Infinitely long wire kept perpendicula to the paper carrying current inwards the given figure?
JEE Advanced 2006 Hard - A planar structure of length and width is made of two different optical media of refractive indices and as shown in figure. If a ray entering from end will emerge from end only if the total internal reflection condition is met inside the structure. For if the incident angle is varied, the maximum time taken by a ray to exit the plane is where is ____.
[Speed of light
JEE Advanced 2019 Medium
More PYQs from JEE Advanced
- A transverse sinusoidal wave moves along a string in the positive \(x\)-direction at a speed of \(10 \mathrm{~cm} / \mathrm{s}\). The wavelength of the wave is \(0.5 \mathrm{~m}\) and its amplitude is \(10 \mathrm{~cm}\). At a particular time \(t\), the snap-shot of the wave is shown in figure. The velocity of point \(P\) when its displacement is \(5 \mathrm{~cm}\) is
JEE Advanced 2008 Easy - The number of solutions of the pair of equations \(2 \sin ^2 \theta-\cos 2 \theta=0\) and \(2 \cos ^2 \theta-3 \sin \theta=0\) in the interval \([0,2 \pi]\) isJEE Advanced 2007 Easy
- The colour of light absorbed by an aqueous solution of \(\mathrm{CuSO}_{4}\) is:JEE Advanced 2012 Medium
- Paragraph:
A tertiary alcohol \(H\) upon acid catalysed dehydration gives a product \(I\). Ozonolysis of I leads to compounds \(\mathrm{J}\) and \(\mathrm{K}\). Compound \(\mathrm{J}\) upon reaction with
\(\mathrm{KOH}\) gives benzyl alcohol and a compound \(\mathrm{L}\), where \(\mathrm{K}\) on reaction with \(\mathrm{KOH}\) gives only \(M\).
Question:
The structures of compounds \(J, K\) and \(L\), respectively, areJEE Advanced 2008 Medium - An ideal gas of density enters a chimney of height at the rate of from its lower end, and escapes through the upper end as shown in the figure. The cross-sectional area of the lower end is and the upper end is . The pressure and the temperature of the gas at the lower end are and , respectively, while its temperature at the upper end is . The chimney is heat insulated so that the gas undergoes adiabatic expansion. Take and the ratio of specific heats of the gas . Ignore atmospheric pressure.
Which of the following statement(s) is(are) correct?JEE Advanced 2022 Hard - A pack contains n cards numbered from 1 to n. Two consecutive numbered cards are removed from the pack and the sum of the numbers on the remaining cards is 1224. If the smaller of the numbers on the removed cards is k, thenJEE Advanced 2013 Medium