JEE Mains · Physics · STD 11 - 12 . kinetic theory of gases
Let \(\gamma_1\) be the ratio of molar specific heat at constant pressure and molar specific heat at constant volume of a monoatomic gas and \(\gamma_2\) be the similar ratio of diatomic gas. Considering the diatomic gas molecule as a rigid rotator, the ratio, \(\frac{\gamma_1}{\gamma_2}\) is
- A \(\frac{27}{35}\)
- B \(\frac{35}{27}\)
- C \(\frac{25}{21}\)
- D \(\frac{21}{25}\)
Answer & Solution
Correct Answer
(C) \(\frac{25}{21}\)
Step-by-step Solution
Detailed explanation
For monoatomic gas \(\gamma_1=\frac{5}{3}\) For diatomic gas at low temperatures \(\gamma _2=\frac{7}{5}\) \(\therefore \frac{\gamma_1}{\gamma_2}=\frac{\frac{5}{3}}{\frac{7}{5}}=\frac{25}{21}\)
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
- Match List\(-I\) with List\(-II\).
Choose the correct answer from the option given below:List\(-I\) List\(-II\) \(A\) Microwaves \(I\) Physiotherapy \(B\) \(UV\) rays \(II\) Treatment of cancer \(C\) Infra-red rays \(III\) Lasik eye surgery \(D\) \(X\)-rays \(IV\) Aircraft navigation JEE Mains 2023 Medium - A common emitter amplifier circuit, built using an \(npn\) transistor, is shown in the figure. Its \(dc\) current gain is \(250\), \(R_C = 1\,k\, \Omega \) and \(V_{CC} = 10\,V\). What is the minimum base current for \(V_{CE}\) to reach saturation?.........\(\mu A\)
JEE Mains 2019 Medium - Given below are two statements : Statement \(I :\) Stopping potential in photoelectric effect does not depend on the power of the light source. Statement \(II :\) For a given metal, the maximum kinetic energy of the photoelectron depends on the wavelength of the incident light. In the light of above statements, choose the most appropriate answer from the options given below. Options :JEE Mains 2023 Medium
- As shown in figures, three identical polaroids \(P_1\), \(P _2\) and \(P _3\) are placed one after another. The pass axis of \(P_2\) and \(P_3\) are inclined at angle of \(60^{\circ}\) and \(90^{\circ}\) with respect to axis of \(P _1\). The source \(S\) has an intensity of \(256 \frac{ W }{ m ^2}\). The intensity of light at point \(O\) is \(...........\frac{ W }{ m ^2}\).
JEE Mains 2023 Medium - An object \(AB\) is placed \(15\text{ cm}\) on the left of a convex lens \(P\) of focal length \(10\text{ cm}\). Another convex lens \(Q\) is now placed \(15\text{ cm}\) right of lens \(P\). If the focal length of lens \(Q\) is \(15\text{ cm}\), the final image is _______.JEE Mains 2026 Medium
- When current in a coil changes from \(5\,A\) to \(2\,A\) in \(0 .1\,s,\) average voltage of \(50\,V\) is produced. The self- inductance of the coil is.......\(H\)JEE Mains 2015 Medium
More PYQs from JEE Mains
- Charge is distributed within a sphere of radius \(R\) with a volume charge density \(\rho (r) = \frac{A}{{{r^2}}}{e^{ - 2r/a}}\) where \(A\) and \(a\) are constants. If \(Q\) is the total charge of this charge distribution, the radius \(R\) is.JEE Mains 2019 Hard
- Let \(A=\left\{n \in N \mid n^{2} \leq n+10,000\right\}, B=\{3 k+1 \mid k \in N\}\) and \(C=\{2 k \mid k \in N\}\), then the sum of all the elements of the set \(A \cap(B-C)\) is equal to \(.....\)JEE Mains 2021 Medium
- If the range of the function \(f(x)=\frac{5-x}{x^2-3 x+2}\), \(x \neq 1,2\), is \((-\infty, \alpha] \cup[\beta, \infty)\), then \(\alpha^2+\beta^2\) is equal to:JEE Mains 2025 Medium
- Let \(f, g: N \rightarrow N\) such that \(f(n+1)=f(n)+f(1)\) \(\forall \, n \in N\) and \(g\) be any arbitrary function. Which of the following statements is \(NOT\) true ?JEE Mains 2021 Medium
- At any instant the velocity of a particle of mass \(500\,g\) is \(\left(2 t \hat{ i }+3 t ^2 \hat{ j }\right)\,ms ^{-1}\). If the force acting on the particle at \(t=1 s\) is \((\hat{i}+x \hat{j}) N\). Then the value of \(x\) will be:JEE Mains 2023 Medium
- The equation of a common tangent to the parabolas \(y = x ^{2}\) and \(y =-( x -2)^{2}\) is.JEE Mains 2022 Hard