Learn

Saturday, 31 October

JEE Main 2024 · PhysicsMultiple choiceDiagram basedMediumData or graph

JEE Main 5 April 2024, Shift 1, Physics Q38

Question 38 of 90 in this shift, Physics question 8 of 30, Section A.

The heat absorbed by a system in going through the given cyclic process is :

The figure, in words

P-V diagram with a circular cyclic process (clockwise arrow). Vertical axis labelled P (in cc) with marks 60 and 340; horizontal axis labelled V (in kPa) with marks 60 and 340. The circle touches the dotted lines at 60 and 340 on both axes, centre marked with a dot.
  1. (1)431.2 J
  2. (2)616 J
  3. (3)61.6 JOfficial answer
  4. (4)19.6 J

Official answer

Option 3

NTA final key.

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

Same topic in other shifts

All First Law of Thermodynamics questions
  1. 2 Apr 2026, Shift 1 · Q47A vessel contains 0.15 m30.15\ \mathrm{m^3} of a gas at pressure 88 bar and temperature 140 ∘140\ ^\circC with cp=3Rc_p=3R and cv=2Rc_v=2R. It is…MediumNumerical value
  2. 2 Apr 2026, Shift 2 · Q485 moles of unknown gas is heated at constant volume from 10°C to 20°C. The molar specific heat of this gas at constant pressure cp=8c_p = 8…MediumNumerical value
  3. 5 Apr 2026, Shift 1 · Q33Consider the following statements: A. Zeroth law of thermodynamics gives concept of temperature B. First law of thermodynamics gives…MediumOther
  4. 6 Apr 2026, Shift 1 · Q50A certain gas is isothermally compressed to (13)rd\left(\frac{1}{3}\right)^{\mathrm{rd}} of its initial volume (V0=3V_0=3 litre) by applying…MediumNumerical value
  5. 6 Apr 2026, Shift 2 · Q35If 2 mole of an ideal monoatomic gas at temperature TT, is mixed with 6 mole of another ideal monoatomic gas at temperature 2T2T then the…EasySingle correct
  6. 8 Apr 2026, Shift 2 · Q35One mole of diatomic gas having rotational modes only is kept in a cylinder with a piston system. The cross-section area of the cylinder…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 108 of the 174 JEE Main shifts held from 2017 to 2026.