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Saturday, 10 October

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JEE Main 7 April 2025, Shift 1, Physics Q48

Question 48 of 75 in this shift, Physics question 23 of 25, Section B.

An ideal gas has undergone through the cyclic process as shown in the figure. Work done by the gas in the entire cycle is _______ ×10−1\times 10^{-1} J. (Take π=3.14\pi = 3.14)

The figure, in words

P-V diagram with P (kPa) on the horizontal axis (marks 300, 400, 500) and V (cm^3) on the vertical axis (marks 150, 250, 350); the cycle is a circle centred at (400 kPa, 250 cm^3) touching 300 and 500 on the P axis and 150 and 350 on the V axis.

Official answer

314

NTA final key.

Chapter
Thermodynamics
Topic
Thermodynamic Processes
Idea tested
Cyclic Process Work

Same idea in other shifts

Asked 3× in all
  1. 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
  2. 9 Apr 2024, Shift 2 · Q36A real gas within a closed chamber at 27∘C27^\circ C undergoes the cyclic process as shown in figure. The gas obeys PV3=RTPV^3=RT equation for…HardSingle correctHas 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 42 of the 174 JEE Main shifts held from 2017 to 2026.