Question

Which of the following expressions regarding the unit of coefficient of viscosity is not true?

• A. $Dynec{m}^{-2}sec$
• B. $Dynec{m}^{2}se{c}^{-1}$
• C. $N{m}^{-2}sec$
• D. $1poise={10}^{-1}N{m}^{-2}sec$

Answer 1

The correct option is B $Dynec{m}^{2}se{c}^{-1}$

The S.I unit of coefficient of viscosity is $N{m}^{-2}sec$. The C.G.S unit of viscosity is $dynec{m}^{-2}sec$ which is equal to $1poise$.

$1poise={10}^{-1}N{m}^{-2}sec$