Learn

Friday, 9 October

JEE Main 2020 · PhysicsMultiple choiceDiagram basedMediumData or graph

JEE Main 8 January 2020, Shift 1, Physics Q8

Question 8 of 75 in this shift, Physics question 8 of 25, Section A.

A thermodynamic cycle xyzxxyzx is shown on a V-T diagram. The P-V diagram that best describes this cycle is : (Diagrams are schematic and not to scale)

The figure, in words

V (vertical) vs T (horizontal) diagram: x near the origin on a dashed line through the origin; x->y along a straight line going up-right; y->z horizontal to the left (V constant); z->x vertical down (T constant).
  1. (1)[figure: P-V diagram, x at top-left, z at top-right, y at bottom-right; x->y along a curve (down-right), y->z vertical up, z->x horizontal left]
  2. (2)[figure: P-V diagram, x top-left, y top-right, z bottom-right; x->y horizontal right, y->z vertical down, z->x along a curve back up-left]Official answer
  3. (3)[figure: P-V diagram, triangle with x top-left, y bottom-left, z bottom-right; x->y vertical down, y->z horizontal right, z->x along the straight hypotenuse]
  4. (4)[figure: P-V diagram, triangle with x top-left, z bottom-left, y bottom-right; x->y along the straight hypotenuse, y->z horizontal left, z->x vertical up]

Official answer

Option 2

NTA final key (Jan 2020).

Chapter
Thermodynamics
Topic
Thermodynamic Processes
Idea tested
Indicator Diagram Conversions

Same topic in other shifts

All Thermodynamic Processes questions
  1. 2 Apr 2026, Shift 1 · Q33Heat is supplied to a diatomic gas at constant pressure. Then the ratio of ΔQ:ΔU:ΔW\Delta Q : \Delta U : \Delta W is ______.EasySingle correct
  2. 6 Apr 2026, Shift 1 · Q55Arrange the following isothermal processes in order of the magnitude of the work (p −- V) involved between states 1 and 2. A. Expansion…MediumSingle correct
  3. 6 Apr 2026, Shift 2 · Q30A cylinder with adiabatic walls is closed at both ends and is divided into two compartments by a frictionless adiabatic piston. Ideal gas…HardSingle correct
  4. 2 Apr 2025, Shift 1 · Q31In an adiabatic process, which of the following statements is true ?EasySingle correct
  5. 2 Apr 2025, Shift 2 · Q32Identify the characteristics of an adiabatic process in a monoatomic gas. (A) Internal energy is constant. (B) Work done in the process is…MediumOther
  6. 3 Apr 2025, Shift 2 · Q33An ideal gas exists in a state with pressure P0\mathrm{P_0}, volume V0\mathrm{V_0}. It is isothermally expanded to 4 times of its initial…MediumSingle correct

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 42 of the 174 JEE Main shifts held from 2017 to 2026.