## Streamlined & turbulent flow-Basic

Compared to other sections, Physics is considered to be the most scoring section. If prepared thoroughly, Physics can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1. Stream-line flow is more likely for liquids with

•  Low density and low viscosity
•  High viscosity and high density
•  High viscosity and low density
•  Low viscosity and high density

High viscosity and low density

Q2. In a laminar flow the velocity of the liquid in contact with the walls of the tub is

•  Zero
•  Maximum
•  In between zero and maximum
•  Equal to critical velocity

Zero

Q3. In a turbulent flow, the velocity of the liquid molecules in contact with the walls of the tube is

•  Zero
•  Maximum
•  Equal to critical velocity
•  May have any value

May have any value

Q4. Which of the following is NOT the characteristic of turbulent flow

•  Velocity more than the critical velocity
•  Velocity less than the critical velocity
•  Irregular flow
•  Molecules crossing from one layer to another

Velocity less than the critical velocity

Q5. The Reynolds number of a flow is the ratio of

•  Gravity to viscous force
•  Gravity force to pressure force
•  Inertia forces to viscous force
•  Viscous forces to pressure forces

Gravity to viscous force

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