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Friday, 9 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 24 June 2022, Shift 1, Physics Q31

Question 31 of 90 in this shift, Physics question 1 of 30, Section A.

The bulk modulus of a liquid is 3×1010 Nm−23\times10^{10}\ \mathrm{Nm^{-2}}. The pressure required to reduce the volume of liquid by 2% is :
  1. (1)3×108 Nm−23\times10^{8}\ \mathrm{Nm^{-2}}
  2. (2)9×108 Nm−29\times10^{8}\ \mathrm{Nm^{-2}}
  3. (3)6×108 Nm−26\times10^{8}\ \mathrm{Nm^{-2}}Official answer
  4. (4)12×108 Nm−212\times10^{8}\ \mathrm{Nm^{-2}}

Official answer

Option 3

NTA final key (2022 Session 1).

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