NTA Abhyas JEE Main2020PhysicsUnits and DimensionsPractice
The correct dimensions of the coefficient of viscosity η are
Options
- A[ M L -1 T - 2 ]
- B[ M L T - 1 ]
- C[ M L - 1 T - 1 ]
- D[ M L - 2 T - 2 ]
Correct answer
C. [ M L - 1 T - 1 ]
Step-by-step solution
Viscous force is given as, F ⁡ = 6 πη r v . ∴ η = F 6 π r v [ η ] = [ F ] [ r ] [ v ] [ η ] = [ MLT - 2 ] [ L ] [ LT - 1 ]