Q. An incompressible fluid flows steadily through a cylindrical pipe which has radius $2r$ at point $A$ and radius $r$ at $B$ further along the flow direction. If the velocity at point $A$ is $v$, its velocity at point $B$ is
A) $2v$
B) $v$
C) $v/2$
D) $4v$
Explanation
The correct answer is Option D: $4v$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.