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Viscosity and Stokes' Law for JEE: 14 solved questions

Real JEE paper questions on viscosity and stokes' law, part of mechanical properties of fluids. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2004 to 2026. No sign-in needed to read them.

What this topic asks

• Stokes' law — 6 questions
• Errors and experimental statements — 3 questions
• Reynolds number — 2 questions
• Velocity gradient and viscous force — 2 questions
• Poiseuille's law — 1 question

All 14 questions with solutions

• A spherical body of radius r and density σ falls freely through a viscous liquid of density ρ and viscosity η… JEE Main 21st Jan 2nd Shift 2026
• In the experiment for the measurement of the viscosity η of a given liquid with a ball of radius R, consider… JEE Main 28th Jan 1st Shift 2025
• Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Asserti… JEE Main 13th April 2nd Shift 2023
• Two tubes of radii r₁ and r₂ and lengths l₁ and l₂ respectively are connected in series, and a liquid flows t… JEE Main Online 2017
• Water from a pipe is coming out at the rate of 100 litres per minute. If the radius of the pipe is 5 cm, the… JEE Main 8th April 1st Shift 2019
• If it takes 5 minutes to fill a 15 litre bucket from a water tap of diameter 2/(√π) cm, then the Reynolds num… JEE Main Online 2015
• A small rigid spherical ball of mass M is dropped into a long vertical tube containing glycerine. The velocit… JEE Main 22nd Jan 2nd Shift 2025
• A small ball of mass m and density ρ is dropped in a viscous liquid of density ρ₀. After some time the ball f… JEE Main 6th April 1st Shift 2024
• A small ball of mass M and density ρ is dropped in a viscous liquid of density ρ₀. After some time the ball f… JEE Main 6th April 1st Shift 2023
• The velocity of a small ball of mass m and density d₁, when dropped in a container filled with glycerine, bec… JEE Main 27th June 1st Shift 2022
• Spherical balls of radius R are falling in a viscous fluid of viscosity η with a velocity v. The retarding vi… AIEEE 2004
• A spherical ball of radius 1 mm and density 10.5 g cm⁻³ is dropped in glycerine of coefficient of viscosity 9… JEE Main 24th Jan 2nd Shift 2023
• A metal block of base area 0.20 m² is placed on a table, with a liquid film of thickness 0.25 mm inserted bet… JEE Main 29th Jan 2nd Shift 2023
• The velocity of the upper layer of water in a river is 36 km h⁻¹. The shearing stress between horizontal laye… JEE Main 25th June 1st Shift 2022