Q. In which one of the following cases will the liquid flow in a pipe be most streamlined
A) Liquid of high viscosity and high density flowing through a pipe of small radius
B) Liquid of high viscosity and low density flowing through a pipe of small radius
C) Liquid of low viscosity and low density flowing through a pipe of large radius
D) Liquid of low viscosity and high density flowing through a pipe of large radius
Explanation
(b) For streamline flow, Reynold’s number $N_{R} \propto \frac{r\ \rho}{\eta}$ should be less. For less value of $N_{R}$, radius and density should be small and viscosity should be high
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.