(B) Let $A_1$ be the area of region $I$ and $v_1$ be the velocity of blood in this region.Similarly,$A_2$ and $v_2$ be the area and velocity in region

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

As the platelets enter a constriction,pressure is lower there.

(B) Let $A_1$ be the area of region $I$ and $v_1$ be the velocity of blood in this region.Similarly,$A_2$ and $v_2$ be the area and velocity in region $II$.Using the equation of continuity,$A_1 v_1 = A_2 v_2$.Since $A_1 > A_2$,it follows that $v_2 > v_1$.Now,using Bernoulli's theorem for horizontal flow,$p + \frac{1}{2} \rho v^2 = \text{constant}$.Since $v_2 > v_1$,the pressure $p_2$ must be less than $p_1$ $(p_2 Hence,the pressure is lower in region $II$ when platelets enter a constriction.

Class 11 Physics Fluid Mechanics and Surface Tension Bernoulli's Theorem and Applications of Bernoulli's Theory

The platelets are drifting with the blood flowing in a streamline flow through a horizontal artery as shown below. The artery is contracted in region $II$. Choose the correct statement.

KVPY 2020 All KVPY

A
As the platelets enter a constriction,the platelets get squeezed closer together in the narrow region and hence the fluid pressure must rise there.
B
As the platelets enter a constriction,pressure is lower there.
C
The artery's cross-section area is smaller in the constriction and thus the pressure must be larger there because pressure equals the force divided by area.
D
Pressure is same in all the parts of the artery.

Explore More

Browse All

Question Bank

All Subjects

Class 11 Questions

Class 11

Physics Questions

Chapter

Fluid Mechanics and Surface Tension

Subtopic

Bernoulli's Theorem and Applications of Bernoulli's Theory

Previous Year

KVPY 2020 Paper All KVPY years →

Application of Bernoulli's theorem can be seen in

Medium

View Solution

The figures below show water flowing through a horizontal pipe from left to right. Note that the pipe in the middle is narrower. Choose the most appropriate depiction of water levels in the vertical pipes.

MediumKVPY 2018

View Solution

Water is in streamline flow along a horizontal pipe with non-uniform cross-section. At a point in the pipe where the area of cross-section is $10 \,cm^{2}$, the velocity of water is $1 \,ms^{-1}$ and the pressure is $2000 \,Pa$. The pressure at another point where the cross-sectional area is $5 \,cm^{2}$ is (in $\,Pa$)

DifficultKCET 2010

View Solution

Water is flowing with a velocity of $2 \ m/s$ in a horizontal pipe where the cross-sectional area is $2 \times 10^{-2} \ m^2$ at a pressure of $4 \times 10^4 \ Pa$. The pressure at a cross-section of area $0.01 \ m^2$ in Pascal will be:

Medium

View Solution

The pressure of water in a water pipe when the tap is closed and opened is $3.5 \times 10^5 \, N/m^2$ and $3 \times 10^5 \, N/m^2$ respectively. With the tap open,the velocity of water flowing is ........... $m/s$. (Take density of water $\rho = 10^3 \, kg/m^3$)

Medium

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

The platelets are drifting with the blood flowing in a streamline flow through a horizontal artery as shown below. The artery is contracted in region $II$. Choose the correct statement.

Similar Questions

Application of Bernoulli's theorem can be seen in

The figures below show water flowing through a horizontal pipe from left to right. Note that the pipe in the middle is narrower. Choose the most appropriate depiction of water levels in the vertical pipes.

Water is flowing with a velocity of $2 \ m/s$ in a horizontal pipe where the cross-sectional area is $2 \times 10^{-2} \ m^2$ at a pressure of $4 \times 10^4 \ Pa$. The pressure at a cross-section of area $0.01 \ m^2$ in Pascal will be:

The pressure of water in a water pipe when the tap is closed and opened is $3.5 \times 10^5 \, N/m^2$ and $3 \times 10^5 \, N/m^2$ respectively. With the tap open,the velocity of water flowing is ........... $m/s$. (Take density of water $\rho = 10^3 \, kg/m^3$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module