question_answer

The rate of flow of liquid in a tube of radius r, length l, whose ends are maintained at a pressure difference P is \[V=\frac{\pi QP\,{{r}^{4}}}{\eta l}\] where \[\eta \] is coefficient of the viscosity and Q is  [DCE 2002]

A)             8     

B)             \[\frac{1}{8}\]

C)             16  

D)             \[\frac{1}{16}\]