JEE Main 2022 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 29 July 2022, Shift 2, Physics Q54

Question 54 of 90 in this shift, Physics question 24 of 30, Section B.

The velocity of a small ball of mass 0.3 g and density 8 g/cc when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is 1.3 g/cc, then the value of viscous force acting on the ball will be

x\times10^{-4}

N. The value of

x

is _______. [use g = 10m/

\mathrm{s^2}

]

Official answer

NTA final key.

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

Same idea in other shifts

Asked 7× in all

6 Apr 2024, Shift 1 · Q35A small ball of mass m and density $\rho$ is dropped in a viscous liquid of density $\rho_0$ . After sometime, the ball falls with constant…MediumSingle correct
9 Apr 2024, Shift 2 · Q40A spherical ball of radius $1\times10^{-4}$ m and density $10^5\ \mathrm{kg/m^3}$ falls freely under gravity through a distance $h$ before…HardSingle correct
6 Apr 2023, Shift 1 · Q33A small ball of mass M and density $\rho$ is dropped in a viscous liquid of density $\rho_0$ . After some time, the ball falls with a…EasySingle correct
27 Jun 2022, Shift 1 · Q39The velocity of a small ball of mass ‘m’ and density $d_1$ , when dropped in a container filled with glycerine, becomes constant after some…MediumSingle correct
28 Jun 2022, Shift 2 · Q37A water drop of radius 1 µm falls in a situation where the effect of buoyant force is negligible. Co-efficient of viscosity of air is…MediumSingle correct
29 Jun 2022, Shift 2 · Q52A small spherical ball of radius 0.1 mm and density $10^4$ $\mathrm{kg\,m^{-3}}$ falls freely under gravity through a distance $h$ before…MediumNumerical 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 108 of the 174 JEE Main shifts held from 2017 to 2026.