Question

The dimensions of coefficient of viscosity are

• A. $$M^1L^{-1}T^{-1}$$
• B. $$M^1L^{1}T^{-1}$$
• C. $$M^{-1}L^{1}T^{1}$$
• D. $$M^1L^{-1}T^{1}$$

Answer 1

Answer:

$$M^1L^{-1}T^{-1}$$

The dimensions of coefficient of viscosity are $M^1L^{-1}T^{-1}$, as it is the tangential force required to maintain a unit velocity gradient between two layers of area one unit each. The equation for viscosity is $\tau$ = µ du/dy , where u is the coefficient of viscosity. The unit of viscosity is N-s/m² or kg/m-sec.