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Saturday, 31 October

JEE Main 2024 · PhysicsMultiple choiceDiagram basedEasyConceptual

JEE Main 1 February 2024, Shift 2, Physics Q40

Question 40 of 90 in this shift, Physics question 10 of 30, Section A.

C1C_1 and C2C_2 are two hollow concentric cubes enclosing charges 2Q and 3Q respectively as shown in figure. The ratio of electric flux passing through C1C_1 and C2C_2 is :

The figure, in words

Two concentric hollow cubes: a small inner cube labelled 2Q and a larger outer cube; the label 3Q is placed at the left edge of the inner cube region, between the inner and outer cubes.
  1. (1)2:32:3
  2. (2)2:52:5Official answer
  3. (3)3:23:2
  4. (4)5:25:2

Official answer

Option 2

NTA final key.

Chapter
Electric Charges and Fields
Topic
Gauss's Law
Idea tested
Gauss Law Application

Same idea in other shifts

Asked 6× in all
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  2. 8 Apr 2025, Shift 2 · Q36An infinitely long wire has uniform linear charge density λ=2\lambda = 2 nC/m. The net flux through a Gaussian cube of side length…MediumSingle correct
  3. 29 Jan 2024, Shift 1 · Q40Two charges of 5Q5Q and −2Q-2Q are situated at the points (3a,0)(3a, 0) and (−5a,0)(-5a, 0) respectively. The electric flux through a sphere of…EasySingle correct
  4. 30 Jan 2024, Shift 2 · Q42Match List I with List II List I | List II A. Gauss's law of magnetostatics | I.…EasyMatch the list
  5. 11 Apr 2023, Shift 2 · Q50A capacitor of capacitance C is charged to a potential V. The flux of the electric field through a closed surface enclosing the positive…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.