Q.
Three tubes $A,\ B$ and $C$ are connected to a horizontal pipe in which liquid is flowing. The radii of pipe at the joints of $A,\ B$ and $C$ are 2 cm, 1 cm and 2 cm respectively. The height of liquid
A) In $A$ is maximum
B) In $A$ and $B$ is equal
C) Is same in all three
D) In $A$ and $C$ is same
Explanation
(d) Since the tubes $A$ and $C$ are connected to a tube of same area of cross-section, and the liquid flowing there will have same velocity, hence the height of liquid in $A$ and $C$ will be same. Since tube $B$ is connected to a tube of smaller area of cross-section, therefore the liquid is flowing faster in this tube and pressure there is less according to Bernoulli’s theorem
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.