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JEE FLUID MECHANICS & WAVES

The unit includes 3 to 4 questions every year and are comparatively stand-alone chapters. At the dearth of time, these chapters can prepared separately. However, forming a 12% of physics, the most important aspects of the unit are Simple Harmonic Motion, Fluid Mechanics & Properties of matter. Periodic Motion is at the heart of this unit. It is possible to understand the formulas and score easy marks from this unit if a certain amount of time is put into it. But it is safe to say this is not a very important unit in physics.

JEE Fluid Mechanics & Waves Chapter Wise Overview

Number of questions asked in each chapter of Waves & Fluid Mechanics from 2010 to 2020 in JEE

 

JEE Physics Chapter-wise weightage of Fluid Mechanics & Waves 2020

Let's find out the chapter-wise weightage of the unit Waves & Fluid Mechanics

Chapters Weightage
Fluid Mechanis 2.5
Simple Harmonic Motion 5
Waves Motion 5

 

List of important topics for JEE Fluid Mechanics & Waves

Fluid mechanics gives us the knowledge of the behaviour of fluid under various forces of fluid and atmospheric conditions whereas waves can be define the wave motion as the disorder that originated in the medium because of the frequent periodic motion of the atoms of the medium and transmitting it from atom to atom. Due to this transmission, the particles remain vibrating about themselves and their mean positions.

  • Calorimetry
  • Surface tension
  • Buoyancy
  • Hydrostatic pressure
  • Stokes' law
  • Viscosity
  • Bernoulli's theorem and its applications
  • Poiseuille's Formula
  • Simple harmonic motion
  • Longitudinal and transverse waves, speed of a wave
  • Principle of superposition of waves, a reflection of waves
  • Wave motion

Fluid Mechanics & Waves JEE Syllabus 2023,2024

  • Periodic motion - period, frequency, displacement as a function of time.
  • Periodic functions
  • Simple harmonic motion (S.H.M.) and its equation; phase: oscillations of a spring -restoring force and force constant: energy in S.H.M. - Kinetic and potential energies
  • Simple pendulum - derivation of expression for its time period: Free, forced and damped oscillations, resonance
  • Wave motion
  • Longitudinal and transverse waves, speed of a wave
  • Displacement relation for a progressive wave
  • Principle of superposition of waves, a reflection of waves
  • Standing waves in strings and organ pipes, fundamental mode and harmonics
  • Beats
  • Doppler Effect in sound
  • Elastic behaviour, Stress-strain relationship, Hooke's Law. 
  • Young's modulus, bulk modulus, modulus of rigidity
  • Pressure due to a fluid column; Pascal's law and its applications
  • Viscosity
  • Stokes' law
  • Terminal velocity, streamline and turbulent flow
  • Reynolds number
  • Bernoulli's principle and its applications
  • Surface energy and surface tension, angle of contact, application of surface tension -drops, bubbles and capillary rise
  • Heat, temperature, thermal expansion; specific heat capacity, calorimetry; change of state, latent heat
  • Heat transfer-conduction, convection and radiation
  • Newton's law of cooling

Fluid Mechanics & Waves JEE Video Lectures

 

Fluid Mechanics & Waves JEE Books

List of Chapters of Waves & Fluid Mechanics  
1-PROPERTIES OF MATTER Download
2-FLOW OF LIQUID Download
3-VISCOSITY & SURFACE Download
4-WAVES Download
5-SIMPLE HARMONIC MOTION Download

Fluid Mechanics & Waves JEE Test Series 2022,2023,2024

List of FREE Waves & Fluid Mechanics Tests  
Paper set 1 (Easy) Download Questions Download Solutions
Paper set 2 (Moderate) Download Questions Download Solutions
Paper set 3 (Difficult) Download Questions Download Solutions

Important questions from Fluid Mechanics for JEE 2022 and 2023

  • 1
  • 2

Q.

A hollow sphere of mass M and radius R is immersed in a tank of water  The sphere would float if it were set free. The sphere is tied to the bottom of the tank by two wires which makes angle  with the horizontal as shown in the figure. The tension  in the wire is :

                                                              

Q.

Match Column 1 (Property at fluid) with Column 2.

(Law of fluid motion) and select the correct answer.

                                  

 

       Column 1

 

     Column 2

 (P)

 Volume rate of flow

  1.

 Bernoulli’s theorem

 (Q)

 Viscous drag

  2.

 Torricelli’s theorem

 (R)

 Speed of efflux (exit)

  3.

 Stoke’s law

 (S)

 Pressure difference  between two points

  4.

 Poisuilli’s law points in a  flow tube 

 

Q. Is Fluid Mechanics easy?

Fluid Mechanics requires knowledge of Maths concepts of calculus and Vectors so if you find these topics of maths easy then fluid will be easy. So will advise you to learn these topics to master Fluid.

Q. How many questions are asked from Fluid Mechanics in JEE?

About 3 to 4 questions are asked every year which is around 12-16 Marks. In JEE 2020 and 2019, 2 questions were asked. So in 2022, you can expect more questions from the topic

Q. Which are the important topics in Fluid mechanics?

SHM (Simple Harmonic Motion) 1 or 2 questions are asked every year, Waves 1 question is asked every year, Fluid (Pascal and Archimedes principle) 1 or 2 questions are asked every year

Q. Why is fluid Mechanics so hard?

Fluid mechanics seems to be hard since it requires knowledge of Maths calculus and vectors. The problem comes in the part where Integral is taught in class 12 while fluid is a part of class 11th and integral is used in the fluid. So we at kaysons have introduced a topic of basic physics that explains your basic integral so that you can answer all questions of fluid properly

Q. How to improve Fluid Mechanics?

Focus on Pascal and Archimedes principles along with SHM. These are important topics for JEE. Practise integral calculus will help you improve fluid since questions are based on these topics.

Q. Is NCERT enough for Fluid Mechanics?

Some questions come from NCERT but will only help you qualify for JEE main you will not get any college. To get a good Rank below 10000 NCERT is not enough for Fluid Mechanics

Q. Can I skip fluid Mechanics?

We will not advise you to completely skip fluid but you can do Pascal and Archimedes principle along with SHM should be enough

Q. Which are the easiest topics in Fluid Mechanics?

Pascal and Archimedes' principles are important and easy you can also focus on SHM which is easy. To improve you can 1st learn calculus and then try your hands on fluid.