JEE Main 2020PhysicsThermodynamicsEasyMCQ

JEE Main 2020 — Thermodynamics Question with Solution

JEE Main 2020 (07 Jan Shift 2)

Question

Under an adiabatic process, the volume of an ideal gas gets doubled. Consequently, the mean collision time between the gas molecule changes from τ1 to τ2 . If CPCv=γ for this gas then a good estimate for τ2τ1 is given by

Choose an option

Show full solutionCorrect option: D
Correct answer
D12γ+12

Step-by-step explanation

Relaxation time τ∝VT
And T∝1Vγ-1
τ∝V1+γ-12
τ∝V1+γ2
τfτi=2VVγ+12
τfτi=2γ+12

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About this question

This is a previous-year question from JEE Main 2020, covering the Thermodynamics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.