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# JEE Main Physics Important Chapters

Last updated date: 19th Sep 2024
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## Achieving a 99 %ile in JEE Mains Physics: A Guide to the Key Topics and Chapterwise Weightage

Physics remains a popular subject among JEE aspirants due to its role in fostering critical thinking and problem-solving skills. Its significance in competitive exams like JEE Main and Advanced cannot be overstated. In these exams, physics questions primarily assess conceptual knowledge, necessitating a strong foundation and practical application of concepts to excel.

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The physics section in the JEE Main exam is typically of moderate difficulty. It comprises a mix of numerical and concept-based questions. Some questions are relatively easy and can be solved quickly, making it a scoring section. The presence of formula-based numerical and straightforward conceptual questions contributes to its reputation.

To score well in JEE Main 2025 physics, a thorough understanding of important topics is crucial. This section contains 30 questions, of which 5 are numerical value-based. Expect numerical questions more than fact-based ones in this segment, often drawn from significant physics chapters for JEE Main.

Effective preparation for this section should begin with basic topics, as even concepts like unit and dimensions can help eliminate options in questions. The paper usually includes 2-3 theory-based questions that cover areas like communication systems, semiconductors, and others.

## JEE Main Physics Important Chapters That Will Make or Break Your JEE Main Score

To achieve a high score, it's essential to concentrate on specific important chapters that have historically carried significant weightage in the exam. In this guide, we have categorised these crucial topics into easy and difficult segments based on the level of questions asked in previous years' JEE Main papers. These are the important topics for JEE Main Physics 2025:

• Rotational Motion

• Thermodynamics

• Oscillations And Waves

• Electrostatics

• Optics

• Magnetic Effects Of Current And Magnetism

• Modern physics

By focusing on these chapters, you can aim to score more than 60 marks in the Physics paper. Let's dive into the details!

### Syllabus of Physics Chapters That You Can't Afford to Ignore for JEE Main

Mastering the Physics section of the Joint Entrance Examination (JEE) Main can be challenging, especially when dealing with certain intricate topics. These areas demand extensive practice and dedicated preparation to excel. The exam questions are often of a high level, involving numerical complexities and the amalgamation of 2-3 concepts. Below, we outline these demanding topics that necessitate special attention:

 Most Important Chapters of JEE Main Physics 2025 Rotational Motion Centre of the mass of a two-particle system, Centre of the mass of a rigid body; Basic concepts of rotational motion; a moment of a force; torque, angular momentum, conservation of angular momentum and its applications; the moment of inertia, the radius of gyration. Values of moments of inertia for simple geometrical objects, parallel and perpendicular axes theorems, and their applications. Rigid body rotation equations of rotational motion. Thermodynamics Thermal equilibrium, zeroth law of thermodynamics, the concept of temperature. Heat, work, and internal energy. The first law of thermodynamics. The second law of Thermodynamics: reversible and irreversible processes. Carnot engine and its efficiency. Oscillations and Waves 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. Electrostatics Electric charges: Conservation of charge. Coulomb's law forces between two point charges, forces between multiple charges: superposition principle and continuous charge distribution.Electric field: Electric field due to a point charge, Electric field lines. Electric dipole, Electric field due to a dipole. Torque on a dipole in a uniform electric field.Electric flux. Gauss's law and its applications to find field due to infinitely long uniformly charged straight wire, uniformly charged infinite plane sheet, and uniformly charged thin spherical shell. Electric potential and its calculation for a point charge, electric dipole and system of charges; Equipotential surfaces, Electrical potential energy of a system of two point charges in an electrostatic field.Conductors and insulators. Dielectrics and electric polarization, capacitor, the combination of capacitors in series and parallel, capacitance of a parallel plate capacitor with and without dielectric medium between the plates. Energy stored in a capacitor. Optics Reflection and refraction of light at plane and spherical surfaces, mirror formula. Total internal reflection and its applications. Deviation and Dispersion of light by a; prism; Lens Formula. Magnification. Power of a Lens. Combination of thin lenses in contact. Microscope and Astronomical Telescope (reflecting and refracting ) and their magnifying powers.Wave optics: wavefront and Huygens' principle. Laws of reflection and refraction using Huygens principle. Interference, Young's double-slit experiment and expression for fringe width, coherent sources, and sustained interference of light. Diffraction due to a single slit, width of central maximum. Resolving power of microscopes and astronomical telescopes. Polarization, plane-polarized light: Brewster's law, uses of plane-polarized light and Polaroid. Magnetic Effects of Current and Magnetism Biot - Savart law and its application to current carrying circular loop. Ampere's law and its applications to infinitely long current carrying straight wire and solenoid. Force on a moving charge in uniform magnetic and electric fields. Cyclotron.Force on a current-carrying conductor in a uniform magnetic field. The force between two parallel currents carrying conductors-definition of ampere. Torque experienced by a current loop in a uniform magnetic field: Moving coil galvanometer, its current sensitivity, and conversion to ammeter and voltmeter.Current loop as a magnetic dipole and its magnetic dipole moment. Bar magnet as an equivalent solenoid, magnetic field lines; Earth's magnetic field and magnetic elements. Para-, dia- and ferromagnetic substances. Magnetic susceptibility and permeability. Hysteresis. Electromagnets and permanent magnets. 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.

### Easy Chapters of Physics in JEE Main: Get High Marks with Less Effort

Preparing strategically for the Joint Entrance Examination (JEE) Main Physics section is essential for success. To optimise your performance, it's wise to focus on topics that offer a higher probability of scoring well which is mentioned above. In this section, we present the easy-scoring topics in the JEE Main Physics paper. These topics are known for their relatively easier questions and require minimal time and calculations to arrive at the correct answers.

 Easy Scoring Chapters of Physics JEE Main 2025 Current Electricity Electric current. Drift velocity. Ohm's law. Electrical resistance. Resistances of different materials. V-l characteristics of Ohmic and non-ohmic conductors. Electrical energy and power. Electrical resistivity. Colour code for resistors; Series and parallel combinations of resistors; Temperature dependence of resistance.Electric Cell and its Internal resistance, potential difference and emf of a cell, a combination of cells in series and parallel. Kirchhoff’s laws and their applications. Wheatstone bridge. Metre Bridge. Potentiometer - principle and its applications. Electromagnetic Induction and Alternating Currents Electromagnetic induction: Faraday's law. Induced emf and current: Lenz’s Law, Eddy currents. Self and mutual inductance. Alternating currents, peak and RMS value of alternating current/ voltage: reactance and impedance: LCR series circuit, resonance: Quality factor, power in AC circuits, wattless current. AC generator and transformer. Electronic Devices Semiconductors; semiconductor diode: 1-V characteristics in forward and reverse bias; diode as a rectifier; I-V characteristics of LED. the photodiode, solar cell, and Zener diode; Zener diode as a voltage regulator. Junction transistor, transistor action, characteristics of a transistor: transistor as an amplifier (common emitter configuration) and oscillator. Logic gates (OR. AND. NOT. NAND and NOR). Transistor as a switch. Communication Systems Propagation of electromagnetic waves in the atmosphere; Sky and space wave propagation. Need for modulation. Amplitude and Frequency Modulation, Bandwidth of signals. the bandwidth of the Transmission medium, Basic Elements of a Communication System (Block Diagram only).

## Weightage Analysis of Physics Chapters in JEE Main Examination

Please be aware that the following topics have been listed based on their JEE Main marks-wise weightage, using data from the previous five years. Additionally, each question in the exam carries a weight of 4 marks.

 Units Questions Weightage (in %) Current Electricity 3 9.9 Magnetic Effect of Current and Magnetism 2 6.6 Alternating Current 2 6.6 Kinetic Theory of Gases & Thermodynamics 2 6.6 Kinematics 2 6.6 Work, Energy, and Power 2 6.6 Laws of Motion 2 6.6 Centre of Mass 2 6.6 Rotational Dynamics 2 6.6 Modern Physics 2 6.6 Wave Optics 2 6.6 Electrostatics 1 3.3 Capacitors 1 3.3 Simple Harmonic Motion 1 3.3 Sound Waves 1 3.3 Elasticity 1 3.3 Error in Measurement 1 3.3 Circular Motion 1 3.3 Electromagnetic Waves 1 3.3 Semiconductors 1 3.3 Communication Systems 1 3.3

### The Top 5 Advantages of Referring to Vedantu's Physics Important Chapters for JEE Main

• The JEE Main exam is a very competitive exam, so it is important to start preparing early. Vedantu's Important Chapters can help you get a head start by providing you with a comprehensive overview of the most important topics in physics.

• Not all topics in physics are equally important for the JEE Main exam. Vedantu's Important Chapters will help you identify the most important topics so that you can focus your studies on them.

• The best way to learn physics is by doing practice problems. Vedantu provides a comprehensive set of practice problems that will help you test your understanding of the concepts.

• Mock tests are a great way to simulate the actual JEE Main exam and to identify your strengths and weaknesses.

• Get help from a tutor. If you are struggling with a particular topic, it can be helpful to get help from a tutor. Vedantu has a team of experienced tutors who can help you understand the concepts and solve problems.

## Conclusion

Physics is a fascinating subject that can pave the way for success in JEE Main and Advanced. By focusing on building a strong conceptual foundation, honing problem-solving abilities, and applying theoretical knowledge practically, you can enhance your chances of scoring well. Remember, consistent practice and dedication are key to mastering physics and achieving your goals in the JEE exams. So, keep learning, stay motivated, and approach the subject with enthusiasm to excel in your physics journey. Good luck!

## FAQs on JEE Main Physics Important Chapters

1. What are the most important chapters in JEE Main Physics that I should prioritize during my preparation?

The most important chapters in JEE Main Physics are Mechanics, Electrostatics and Electromagnetism, Optics, Modern Physics, Thermodynamics and Kinetic Theory, and Oscillations and Waves. Focusing on these chapters will significantly enhance your chances of scoring well in the exam.

2. How can I avoid making mistakes in JEE Main exam?

There are a few things that you can do to avoid making mistakes. First, you should start studying early. Second, you should focus on the important topics. Third, you should do a lot of practice problems. Fourth, you should take mock tests. Fifth, get help from the experts when you need it.

3. How should I approach studying the important chapters to excel in JEE Main Physics?

To excel in the important chapters, start by thoroughly understanding the underlying concepts and theories. Practice solving a wide range of problems from each chapter to strengthen your problem-solving skills. Additionally, take mock tests and previous year's question papers provided by Vedantu to familiarize yourself with the exam pattern and time management.

4. Can you suggest some effective study materials or resources for mastering Physics important chapters for JEE Main?

Vedantu, and NCERT textbooks are excellent resources for studying JEE Main Physics. Vedantu offers comprehensive study materials, video lectures, and practice questions to help you grasp the concepts effectively.

5. Is it enough to study only the important chapters, or should I cover the entire JEE Main Physics syllabus?

While focusing on the important chapters is essential for scoring well in the exam, it is equally important to have a good understanding of the entire JEE Main Physics syllabus. Questions can come from any section, so having a well-rounded preparation will boost your confidence and overall performance.

6. Are numerical problem-solving skills more critical than theoretical knowledge for the JEE Main Physics exam?

Both numerical problem-solving skills and theoretical knowledge are crucial for the JEE Main Physics exam. A balanced approach, where you understand the concepts and can apply them to solve numerical problems, will lead to better results.

7. What are the important chapters of Physics class 11 for JEE Mains?

Here are some of the most important chapters of physics class 11 for JEE Mains:

• Kinematics

• Laws of Motion

• Work, Energy, and Power

• Rotational Motion

• Thermodynamics

• Oscillations and Waves

• Electrostatics

• Magnetism

• Optics

8. What are the important JEE Mains chapters from 12th Physics?

Here are some of the most important JEE Mains chapters from 12th physics:

• Current Electricity

• Moving Charges and Magnetism

• Electromagnetic Induction

• Alternating Current

• Wave Optics

• Modern Physics