Question

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

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

Answer 1

The correct option is D $1poise={10}^{-1}N{m}^{-2}sec$

All the four options are incorrect.
The S.I unit of the coefficient of viscocity is $N{m}^{-2}sec$
The C.G.S unit of viscocity is $dynes.c{m}^{-2}sec$ It is equal to 1 poise.
$1Poise=0.1N{m}^{-2}sec$