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Which one of the following represents the correct dimensions of the coefficient of viscosity?

  1. ML-1T-1
  2. MLT-1
  3. ML-1T-2
  4. ML-2T-2
in Physics by Expert (11.5k points) | 29 views

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option 1 is correct 

From stokes law, Viscous force F = \(6\pi \eta rv\)

\( \Rightarrow \eta = {F \over {6\pi rv}}\)

\(\therefore[\eta] = {[{ML{T^{ - 2}}]} \over {[L][L{T^{ - 1}}]}}\)

\( \Rightarrow [\eta] = [M{L^{ - 1}}{T^{ - 1}}]\)

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