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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceDiagram basedEasyData or graph

JEE Main 29 July 2022, Shift 2, Physics Q47

Question 47 of 90 in this shift, Physics question 17 of 30, Section A.

A thermodynamic system is taken from an original state D to an intermediate state E by the linear process shown in the figure. Its volume is then reduced to the original volume from E to F by an isobaric process. The total work done by the gas from D to E to F will be

The figure, in words

P-V diagram (P in N/m^2 vs V in m^3): D at (2.0, 600); straight line D to E at (5.0, 300); isobaric line E to F at P = 300 back to V = 2.0; dashed verticals at V = 2.0 and 5.0; arrow from F up to D.
  1. (1)−450-450 J
  2. (2)450 JOfficial answer
  3. (3)900 J
  4. (4)1350 J

Official answer

Option 2

NTA final key.

Chapter
Thermodynamics
Topic
First Law of Thermodynamics
Idea tested
Work Done from P-V Graph Area

Same idea in other shifts

Asked 2× in all
  1. 8 Jan 2020, Shift 1 · Q47The magnitude of work done by a gas that undergoes a reversible expansion along the path ABC shown in the figure is ______.EasyNumerical valueHas a figure

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.