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EXPERT SPEAK ON JEE PHYSICS Flipbook PDF
EXPERT SPEAK ON JEE PHYSICS HOW TO PREPARE IITJEE PHYSICS
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MEDICINE FOR PHYSICS (JEE ADVANCED/MAINS) BANOTH SHIVKUMAR (JEE ADVANCED PHYSICS LECTURER) Most of the JEE aspirants consider physics as one of their favourite subjects because it not only helps them to develop critical thinking but also helps them to acquire problem-solving skills. It also happens to be key subjects particularly in highly competitive examinations like JEE Mains and Advanced. In JEE exams, the questions asked in the physics section are generally based on the conceptual knowledge about the topic. For scoring well, you are required to have a strong conceptual base along with the practical application of concepts. There are around 20 chapters included in JEE Physics syllabus and out of these, there are several important topics that must be focused on while preparing for JEE Physics: 1. Mechanics: The questions asked from this unit are either directly based on some mechanical concepts or might require considerable skills in mechanics, which could help you in solving the question. JEE mechanics is all about few fundamental laws like – Newton’s laws of motion, laws of gravitation, laws of conservation of linear and angular momentum. All these laws form a framework in physics and thus it is expected that you should understand all these laws and apply them to practical problems. Questions from mechanics could be solved easily by the combination of Laws of conservation of energy, Newton’s laws, Equation of continuity, Work energy theorem, Laws of conservation of momentum and Bernoulli’s theorem. These topics have applications in other chapters of Physics too. Therefore, they are probably the most important topics that you need to focus on. 2. Electricity and magnetism: Due to its vastness and the level of difficulty, this unit is very crucial for both JEE Mains and Advanced. Every year lots of questions are asked in JEE from this unit. You don’t have to worry much about physics in JEE if you practice and prepare well for this unit. You can expect lots of questions from capacitance, coulombs law, and its applications. Don’t get scared of complicated circuit problems and try to understand the fundamentals for reducing complicated electrical circuits into simpler ones. Practice several questions from Kirchhoff’s laws and seriesparallel circuit reduction and also don’t ignore the theoretical aspects of the topic. Memorise all the formulas and practice several questions from electrostatics, Motional EMF, and magnetostatics. 3. Fluid mechanics and Thermal physics: Familiarize yourself with the calculations of work, heat, Carnot engine and its efficiency, internal energy and the laws of thermodynamics. Several times in JEE Exams questions from the laws of thermodynamics were mixed with the calorimetry. Practice several numbers of questions from fluid mechanics as well. 4. Oscillation and waves: Every year around 4 to 5 questions are generally asked from this unit. Try to understand certain complex topics like the principle of superposition, reflection & refraction of waves, forced and damped oscillations, resonance, Simple Harmonic Motion, Doppler effects in sound through visualization. It will not only make you understand the concepts easily but will also help you in retaining it for a longer period of time. 5. Optics: This is one of the easiest and high scoring Topic. Practice several numbers of questions from this unit and try to focus more on certain important topics like Interference, Young’s double slit experiment, wavefront, Huygens’ principle, Laws of reflection & refraction, Polarisation, Dispersion of light by the prism, Lens Formula and Magnification.
6. Modern physics: Mostly theoretical questions are asked from this unit. Focus more on understanding the Bohr’s model of atomic structure. Formula-based questions are generally asked from this unit, therefore, memorize all the formulas properly and use them correctly while answering the questions. IIT JEE Physics Important Topics Moment Of Inertia Energy Conservation Of Momentum Radiation Stefan Boltzmann Law Newtons Law Of Cooling
Rotational Motion Gravitation Superposition Of Waves Wave Optics Youngs Double Slit Experiment Conduction
We will take a look at JEE 2019,2018 physics section that includes JEE Main paper and JEE Advanced paper. JEE Advanced 2019 Physics Paper 1 and 2 Physics questions in paper 1 and paper 2 were on a moderate level but lengthy. The paper consisted of 2 easy questions while 19 were of a medium level and 14 were highly difficult. The total weightage for the paper was 186 and each section was given a maximum of 62 marks. In paper 1, 19 questions were asked from the 11th syllabus while 16 questions were from the 12th standard. The physics section in both the papers had questions that were concept and application based on some calculations. JEE Advanced 2019 Physics Paper 1 and 2 Topics
No of Questions
Weightage of Marks
KTG and Thermodynamics
5
14.05%
Geometrical Optics and Physical Optics
4
11.83%
Electrostatics
3
9.33%
Nuclear Physics
2
4.33%
String Wave
2
4.96%
Electromagnetic Induction
2
5.50%
Modern Physics
2
5.70%
Capacitance
2
5.50%
Electromagnetic Field
2
5.83%
Sound Waves
1
2.83%
Gravitation
1
2.50%
Surface Tension
1
3.33%
Work, Power and Energy
1
2.48%
Heat Transfer
1
2.50%
Error in Measurement
1
2.48%
Rigid Body Dynamics
1
3.33%
Current Electricity
1
3.31%
SHM
1
3.31%
Unit and Dimension
1
2.48%
Mathematical Tools
1
2.50%
Projectile Motion
1
2.48%
Wave Optics
1
3.31%
Elasticity and Viscosity
1
2.48%
JEE Advanced 2018 Physics Paper 1 and 2 In paper 1, the difficulty of physics was on a moderate level. The paper consisted of 11 easy questions while 5 were of a moderate level and 2 were highly difficult. In paper 2, seven MCQs with a single correct answer was asked. However, the total weightage for the section was 21 marks where 9 questions each were asked from the 11th and 12th standard syllabus. JEE Advanced 2018 Physics Paper 1 and 2 Topics
No of Questions
Weightage of Marks
Mechanics
15
41.67%
Electrodynamics
8
22.50%
Heat & Thermodynamics
4
10.83%
SHM & Waves
3
8.33%
KTG & Thermodynamics
3
8.33%
Error in Measurement
3
7.50%
Electrostatics
3
8.33%
Rigid Body Dynamics
3
8.33%
Modern Physics
3
8.33%
Elasticity & Viscosity
2
5.83%
Unit & Dimension
2
5.00%
Electromagnetic Field
2
5.83%
Optics
2
5.83%
Geometrical Optics & Physical Optics
2
5.83%
Sound Waves
2
5.83%
Gravitation
1
2.50%
Surface Tension
1
3.33%
Work, Power & Energy
1
3.33%
Heat Transfer
1
2.50%
Circular Motion
1
3.33%
Mathematical Tool
1
2.50%
Current Electricity
1
2.50%
Nuclear Physics
1
3.33%
Photoelectric Effect
1
2.50%
Bohr Atomic Model
1
2.50%
Electromagnetic Induction
1
3.33%
Capacitance
1
2.50%
SHM
1
2.50%
Mathematical Tools
1
2.50%
Projectile Motion
1
2.50%
Advanced 2018 Cutoffs JEE (Advanced) 2018 Cut-off Category
Cut-off Marks
% Reservation
% Cutoff
General
126
50.50%
35.00%
ST
63
7.50%
17.50%
SC
63
15.00%
17.50%
OBC
113
27.00%
31.50%
JEE Mains 2019 Physics Section During JEE Main 2019, the physics section was deemed to be the toughest section among the three sections. The questions were tricky, lengthy and students had to make an extra effort to solve the questions with their logical and reasoning skills. The physics section consisted of a total of 30 Question. In this, 13 questions were set from electromagnetism, 8 from mechanics 2 from modern physics, 3 from optics, 3 from thermodynamics, 1 from SHM and Waves. In this paper, 10 questions were quite easy, 17 were moderate and 3 questions were difficult. Physics JEE MAINS 2019 Topics
No of Questions
Weightage of Marks
Electromagnetic Induction, AC
1
4
Solids and Fluids
1
4
Waves
1
4
Work, Power and Energy
1
4
Gravitation
1
4
Simple Harmonic Motion
1
4
Unit, Dimension and Vector
1
4
Kinematics
1
4
Laws of motion
1
4
Centre Of Mass, Impulse and Momentum
1
4
Rotation
1
4
Magnetics
2
8
Heat and Thermodynamics
3
12
Current Electricity
3
12
Electrostatics
3
12
Optics
3
12
Modern Physics
5
20
Total
30
120
Apart from this, some of the important chapters for 2019 include:
Ray Optics
Electrostatics
Photoelectric Effect and Electromagnetic Wave
Current Electricity
JEE Mains 2018 Physics Section In 2018 Jee Mains question paper the physics section, as usual, was difficult. Most of the questions were designed to test the conceptual knowledge. As for the number, there were 13 questions were from the class 11th syllabus and 17 questions were from class 12th syllabus. In this section, there were 20 moderate, 6 easy questions and 4 difficult questions. No. of Questions
Marks Weightage
Mechanics
10
40
Thermodynamics
2
8
Optics
2
8
Modern Physics
6
24
Electrodynamics
9
36
SHM & Waves
1
4
Total
30
120
How to prepare the concepts of Physics for IIT-JEE The topics in Physics are more conceptual and need thorough understanding. Learning these concepts is quite difficult and needs more time to grasp. Just mugging-up the lessons is surely not an option if you want to rank well in JEE. You might be good with electro statistics or kinematics, but the thorough understanding of Thermodynamics is equally important. The other topics such as Fluid Mechanics, friction, rotational mechanics seems difficult for most students, but it can be easily learnt if you follow a strict schedule and proper guidance. NCERT textbooks are most suitable to prepare for JEE. But, you can also study from numerous reference books out there in the market. Best Books for Physics Concepts of Physics by HC Verma Vol-1 and Vol-2 Understanding of Physics by DC Pandey Problems in General Physics by IE Irodov
Study Tips Physics for IIT-JEE
The questions that are asked in physics involve a large amount of thinking, and one has to be well versed with the concepts before attempting the questions. As you have already dealt with the motion of a body in two dimensions in you 9th standard, you should start your preparation with kinematics. You should practice as many questions as possible After mechanics, it is advised to start with waves and simple harmonic motion. These topics are completely new to you, so you must not feel too overwhelmed as once you start to solve the questions, you will find them very easy. After dealing with SHM and waves, you can start electrostatics and magnetism. These topics involve theorems and laws, and we have to remember formulae based on them which are to be kept in mind while attempting the questions. After finishing electrostatics and magnetism, you can start optics and modern physics. These topics are fairly familiar, as you have covered these in your class 10th; These topics are very scoring, as the questions are simple. The questions from the topics such as gravitation and semiconductors are formulae based and straight forward. Covering these topics will give you an extra edge, as although they do not hold the same weightage as the other sections do, they take very less of your time.
IIT JEE- PHYSICS STUDY TECHNIQUE WITH EXAMPLE For example some people visualize SHM only as a trigonometric equation, x = A sinWt, so a person having a problem with trigonometry will face the same problem here but if the same concept is visualized as a motion on a circle and taking its projection on the x-axis as SHM might help.
Once you are done with the topics you must solve different type of problems because it is one of the best ways to learn physics. Also, they should be practised at regular intervals through daily practice problems which can have a set of 10 questions covering the topics you have completed in the past. This helps in revising the concepts in an efficient way. Also when we are initially learning a topic we should try to solve problems with two or more approaches that are different from one another, because it helps in developing a deeper understanding of the topic. And we begin to realize under which situation we should take which approach. For example problems on mechanics can be solved by both forces as well as energy method. We should try solving the initial problems by both methods then only we can choose which approach is better depending on the requirement of the question. Students will always search how to learn physics easily but actually, there is no easy way to learn physics. Only a dedicated approach along with practice can help us learn physics.
Frequently Asked Questions On IIT JEE Physics How to choose the right JEE physics material for studying? While there are a lot of study materials available in the market, selecting the right physics material is very important. Candidates should always choose a material that is oriented with the exam pattern. Since time is a crucial factor during JEE preparation, it will matter only if candidates make use of relevant materials which consists of detailed and clear explanations of concepts as well as JEE based exercises. These will help them to study productively.
How can I get better at solving physics problems in JEE? Every candidate wants to score high marks in the exam. Therefore they need to be academically strong and have adept problem-solving skills. Candidates should not only study from different books but they should practice solving questions more and more. This is the most effective way to develop better problem-solving skills for physics. In this, candidates should start solving question papers including past papers and sample papers. Solving question will help them understand the concept more clearly and they will learn how they came up with the answer. Aspirants should also write the mock tests and it will help them get a better idea of the JEE exam pattern, duration of the exam, types of questions, etc.
How are the questions set in JEE compared to the exercises given in H.C. Verma and D.C. Pandey book? These physics books are great reference tools for JEE. The questions that are found in the H.C. Verma and D.C. Pandey book are mostly based on the JEE exams. The books contain all types of questions with different levels of difficulty and students who solve them will be well prepared to tackle questions during the exams.
What is the difficulty level of the physics in JEE exams? Well, the physics section is quite tough as the questions asked are tricky and they are designed to test in-depth knowledge of the concepts. Candidates should have efficient analytical as well as problem-solving skills. The questions are difficult and they take up more time compared to maths and chemistry section .
Is NCERT book helpful in mastering the concepts of physics? JEE syllabus is mostly based on the NCERT and CBSE syllabus. Therefore, using NCERT books will come in handy. You should read through the chapters and make it a point to gain a clear understanding of the concepts. Besides, the language used in the book is simple while the concepts are explained in detail. Using this book will help candidates develop a strong foundation of concepts. However, in addition to NCERT books, candidates can also make use of other relevant books that will help them boost their JEE preparation.
Is There Any Negative Marking In JEE Advanced? Yes , JEE advanced does have negative marking in single correct answers, multiple correct answers and comprehension type as well. but there is no negative marking in the integer type questions. paper i will have single correct which will be given 3 marks per correct answer and 1 mark will be deducted for incorrect answer, multiple correct will be given 4 marks per correct answer and 2 marks will be deducted for each incorrect answer, numerical questions 3 marks will be alloted with no negative marking. same pattern will be followed for paper ii, the only difference is instead of integer type there will be comprehension type questions.
“Many of life’s failures are people who did not realize how close they were to success when they gave up.” This is such an inspirational quote. The JEE exam is an examination of perseverance. You really need to work hard and put your best. At times you might feel defeated and might want to give up. But you should never. Did you know Dheerubhai Ambhani Failed 11 times before starting Reliance? Just think about the bright future that you have after cracking the JEE exam. ALL THE VERY BEST BEST REGARDS BANOTH SHIVKUMAR JEE Advanced Physics Lecturer PH.NO 9908205144 EMAIL: [email protected]