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Friday, 9 October

JEE Main 2024 · PhysicsMultiple choiceSingle correctHardMulti-step

JEE Main 9 April 2024, Shift 2, Physics Q40

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

A spherical ball of radius 1×10−41\times10^{-4} m and density 105 kg/m310^5\ \mathrm{kg/m^3} falls freely under gravity through a distance hh before entering a tank of water. If after entering in water the velocity of the ball does not change, then the value of hh is approximately: (The coefficient of viscosity of water is 9.8×10−6 N s/m29.8\times10^{-6}\ N\,s/m^2)
  1. (1)22962296 m
  2. (2)22492249 m
  3. (3)23962396 m
  4. (4)25182518 mOfficial answer

Official answer

Option 4

NTA final key.

Chapter
Mechanical Properties of Fluids
Topic
Viscosity
Idea tested
Terminal Velocity Calculation

Same idea in other shifts

Asked 2× in all
  1. 6 Apr 2023, Shift 1 · Q33A small ball of mass M and density ρ\rho is dropped in a viscous liquid of density ρ0\rho_0. After some time, the ball falls with a…EasySingle 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. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.