Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Fluid Mechanics/
Question 30933
JEE Physics · Hard

Fluid Mechanics: Viscosity MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
ViscosityHardQuestion 30933

Question

Stokes' law gives drag force on a sphere of radius r moving with velocity v in fluid of viscosity η as:
  1. A
    2πηrv
  2. B
    4πηrv
  3. C
    6πηrv
    Correct
  4. D
    πηrv

Correct answer

6πηrv

Explanation

Stokes' law: F = 6πηrv. This drag force acts opposite to velocity.

Review Fluid Mechanics notesStart timed chapter practice