Chapter wise weightage for JEE Main Physics

Physics is generally considered as the hardest of all the three subjects in JEE Mains. Keeping this in mind, you must analyze the previous 10 years question papers of JEE Mains/AIEEE to get an idea of weightage, backed up by data.

Mechanics

Highest weightage is that of Mechanics, this includes all the questions of Optics, Electrostatics and Magnetism. So focus mainly on the mechanics part of class 11th for a clear understanding of the entire JEE Mains Physics.

Important Topics

Relative motion (Problem of river & boat), Projectile motion (Simple manipulation of the formulas of -Range, Maximum Height and Time of Flight), Conservation of momentum and ualso energy collisions (only standard questions are asked).Newtons gravitational law, Keplers laws, Satellites. Rigid body dynamics, Moment of inertia and dynamics of rotational motion.Fluid Mechanics: Pascals law, Bernoullis principle, Viscosity & Reynolds number.Simple Harmonic Motion, Transverse & Longitudinal waves: Superposition and Reflection, Standing waves & Beats, Dopplers effect for both sound and light.

Heat & Thermodynamics

Every year, at least 3 to 4 questions are asked definitely from Heat and Thermodynamics.

Important Topics

Kinetic theory of gases (questions on Ideal Gases are asked), Calorimetry (Usually Principle based questions).Detailed study of Adiabatic, Isothermal, Isochoric & Isobaric processes. First law of Thermodynamics and its applications, Second law of thermodynamics, Carnot Cycle, Refrigerators and Heat Pumps.

Electrostatics & Magnetism

5 to 6 questions are asked in JEE Mains from this section.

Important Topics

Coulombs Law, Electric Field, Field Lines and Flux, Continuous Charge Distribution and Gausss Law (Simple application based problems mostly)Electrostatics of Conductors and Dielectrics, Capacitance and Capacitors (Problems on Parallel Plate Capacitor MUST be practiced)Motion in Electric and Magnetic Field, Biot-Savart Law, Ampere Circuital Law and Working of Cyclotron.

Current Electricity, EMI, Alternating Currents

Relatively easy and the most scoring section of JEE Mains Physics. 4 to 5 questions are asked from these chapters.

Important Topics

Series and parallel arrangements of resistors and cells, Kirchhoffs law and its simple applications and Heating effect of current. Wheatstone Bridge, Meter Bridge and Potentiometer (one question is sure shot from any of these bold topics).Magnetic Flux and Faradays Laws of Induction, Motional EMF and Eddy currents, Inductance (Self & Mutual). AC voltage applied to LR, CR and LCR circuits, Working of AC Generator and DC motor.

Optics & Modern Physics

This is perhaps the easiest section to take care of considering that all the questions asked are completely formula based. 7 to 8 questions are asked in JEE Mains. So, do not think of leaving them AT ALL as they can help you score.

Important Topics

Questions from wave optics (Interference, Polarization, and Diffraction) are generally straight forward and you can solve them easily by just reading the question properly. For Ray Optics: Refraction at spherical surfaces and by lenses also, Refraction by Prism & dispersion.Dual nature of matter, Atoms, Nuclei. Photoelectric effect, Bohrs theory of hydrogen-like atoms, Characteristic and continuous X-rays.

Mathematics

JEE Mains Mathematics is considered to be the rank decider. Chapter-wise weightage is very important to get a clear idea about where to concentrate your efforts.

Algebra

Most of the chapters of class XI make up this unit. 8 to 9 questions are asked in JEE Mains from Algebra.

Important Topics

Modulus and Conjugate of Complex numbers along with their properties, Cube Roots of Unity, Quadratic equations and location of their Roots (simple problems only are asked).Matrices: Types and Operations, Adjoint and Inverse of a Matrix, Properties of Determinants. Permutations & Combinations (Simple statement based questions), Algebra of Events and Probability, Conditional Probability, Bayes TheoremAP, GP, HP and their means, Sum of n terms etc, Binomial Theorem: general and middle terms. Calculation of Mean Deviation, Variance & Standard Deviation.

Coordinate Geometry, Vector & 3D Geometry

Consider that you will get only formula based fixed number of questions (7 to 8) from these chapters. However, not to be taken lightly, a lot of practice is required to avoid any silly or calculation mistakes in these chapters and also, to improve speed and comfort.

Important Topics

Distance of a Point from a Line and Distance between 2 parallel lines, Centroid, Orthocentre, Incentre and Circumcentre of a triangle.Equation of aCircle and Conics in different forms, Equations of Tangent, Normal and Chord of contact of Circles and other Conics.Direction cosines and Equation of Lines in Space, Angle and distance between 2 lines, Equation of Planes, Angle between two planes, Coplanarity of 2 lines.

Calculus

This is the most important section because it has applications not just in Mathematics but in Physics & Chemistry as well. At least 8 to 9 question will be asked from this in JEE Mains.

Important Topics

Various functions and their graphs, Algebra of Limits, Derivatives of different types of functions and their Algebra, Continuity of a function. Rolles and Lagranges Mean Value Theorem, Rate of change of quantities.Maxima and Minima (Statement based problems), Maximum and Minimum values of a function in closed intervals.Indefinite & definite integration of various forms, Definite Integral as a limit of a sum, Area under any given Curve, General and Particular solutions of Differential Equations.

Trigonometry

This is the smallest section in JEE Mathematics section and if you go by the weightage, it has the least. But, considering the fact that trigonometric ratios and concepts are being used in algebra (matrices, complex numbers) and in Calculus as well, this chapter needs to be given importance.
      -Allthe best

Dear Chirag,

According, to the 2017 analysis you can check the important topics for JEE Main below

 

Physics

Capacitance- 6.67%

Current Electricity- 10.00%

Calorimetry & Thermal Expansion- 6.67%

KTG & Thermodynamics- 6.67%

Rigid Body Dynamics- 6.67%

Work, Power & Energy- 6.67%

Modern Physics- 10.00%

 

Chemistry

Chemical Bonding- 6.67%

S-Block- 6.67%

Alkyl Hallide, Alcohol & Ether (Reaction Mechanism)- 13.33%

Mole Concept- 10.00%

 

Mathematics

Co-ordinate Geometry (3-D)- 6.67%

Application of Derivatives- 6.67%

Functions- 6.67%

Matrix & Determinants- 6.67%

Probability- 6.67%

 

Good Luck!!

IIT Kharagpur

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