J & K CET Engineering J and K - CET Engineering Solved Paper-2004

  • question_answer
    The unit of the coefficient of viscosity in SI system is

    A)  \[m/kg-s\]      

    B)  \[~m-s/k{{g}^{2}}\]

    C)  \[kg/m-{{s}^{2}}\]     

    D)  \[kg/m-s\]

    Correct Answer: D

    Solution :

    The coefficient of viscosity of a liquid is defined as the viscous force per unit area of contact between two layers having a unit velocity gradient between them. \[\eta =\frac{F}{A\left( \frac{\Delta {{V}_{x}}}{\Delta Z} \right)}\] The SI unit of coefficient of viscosity is kg/m-s. Also,   \[1\,\,poise=\frac{1}{10}kg\,{{m}^{-1}}\,{{s}^{-1}}\]


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