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Friday, 9 October

JEE Main 2021 · PhysicsMultiple choiceSingle correctEasyData or graph

JEE Main 3 August 2021, Shift 2, Physics Q10

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

The following diagram shows the relation between stress and strain of two materials A and B. The ratio of Young's modulus of A and B is -

The figure, in words

Stress (vertical) vs strain (horizontal) graph with two straight lines from the origin: line A at 60 degrees to the strain axis, line B at 30 degrees to the strain axis.
  1. (1)1:31 : 3
  2. (2)1:11 : 1
  3. (3)3:13 : 1Official answer
  4. (4)1:21 : \sqrt{2}

Official answer

Option 3

NTA final key.

Chapter
Mechanical Properties of Solids
Topic
Elasticity
Idea tested
Elastic Moduli

Same idea in other shifts

Asked 13× in all
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  5. 4 Apr 2025, Shift 2 · Q32A cylindrical rod of length 1 m and radius 4 cm is mounted vertically. It is subjected to a shear force of 10510^5 N at the top.…MediumSingle correct
  6. 7 Apr 2025, Shift 1 · Q32Two wires A and B are made of same material having ratio of lengths LALB=13\frac{L_A}{L_B} = \frac{1}{3} and their diameters ratio…EasySingle correct
  7. 8 Apr 2025, Shift 2 · Q48A sample of a liquid is kept at 1 atm. It is compressed to 5 atm which leads to change of volume of 0.8 cm3^3. If the bulk modulus of the…EasyNumerical value
  8. 9 Apr 2024, Shift 1 · Q53Two persons pull a wire towards themselves. Each person exerts a force of 200200 N on the wire. Young's modulus of the material of wire is…EasyNumerical value

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.