InPho Syllabus 2021

InPho 2021 Syllabus PDF

Due to Covid 19 - The usual three-stage procedure for the selection of the teams to represent India at the International Olympiad that has been followed in prior years is now being shortened to a two-stage procedure as a one-time exception only for the academic year 2020 - 21. Read more about IOQ 2020-21.

The INPhO exam is the second stage for the first five stages of the Olympiad Exam for Physics in India. It eventually leads to the selection of the International Physics Olympiad exam.

The INPhO exam organized by the Homi Bhabha Center For Science Education is usually conducted on the last Sunday of January or the first Sunday of February each year for the higher secondary level students. Students of class 11 and 12 need to first attempt the NSEP exam to be eligible for the INPhO exam. This exam serves as a means to select candidates for the Orientation- Cum-Selection -camp in Physics as well as to represent India for the International Physics Olympiad exam.

Similar to the NSEP exam, the Indian National Physics Olympiad Syllabus 2021 is also similar to the syllabus of class 11 and 12 (CBSE Board). The questions asked in the exam from the INPhO Olympiad Syllabus are subjective and are highly complex as similar to the questions asked in the International Physics Olympiad exams (IPHO). For this particular matter, the syllabus of IPHO should also be considered for the INPhO exam.

INPhO Syllabus 2021

The INPhO syllabus 2021 includes 7 subjective questions which should be solved in the duration of 3 hours. Earlier the INPhO syllabus was similar to the IPhO but now it is quite similar to the NSEC exam. The INPhO syllabus has been changed for the convenience of students preparing for the IITJEE and the Physics Olympiad at the same time.

Detailed INPhO Olympiad Syllabus  2021

The detailed INPhO Olympiad Syllabus 2021 for each section is discussed below. Students can refer to the below-given INPhO Olympiad syllabus for preparation of INPhO exam 2021.





  • Establishment of the Kinematics of a point mass.

  • Newton's Laws and Inertial systems.

  • Closed and Open systems, Momentum and Energy, Power work.

  • Conservation of Energy, Impulse, Conservation of Linear Momentum.

  • Elastic forces, The law of Gravitation, Frictional Forces, Potential Energy, Work in a Gravitational Field, Centripetal Acceleration, Kepler's Laws.


Mechanics of Rigid Bodies

  • Statics, Torque, Centre of Mass.

  • The motion of rigid bodies, Translation, Angular velocity, Rotation, Angular Acceleration, and Conservation of Angular Momentum.

  • Identification of motion of a rigid body around the fixed axis, Kinetic energy of a rotating body, Moment of inertia, External and Internal Forces.

  • Accelerated reference systems and inertial forces



No particular questions will be asked from this topic but students should know the elementary concepts of pressure, the continuity law, and buoyancy


Thermodynamics and molecular physics

  • Internal energy, First and Second laws of Thermodynamics, Work and Heat.

  • Model of a perfect gas, Pressure and molecular kinetic energy, Formulation of state of a perfect gas, Avogadro's number, Absolute Temperature.

  • The accomplishment of work by an expanding gas limited to isothermal and adiabatic processes.

  • The Carnot cycle, Reversible and Irreversible processes, Thermodynamics Efficiency, Entropy (statistical approach), and Boltzmann factor


Oscillations and waves

  • Harmonic oscillations and the equation of Harmonic Oscillation.

  • Harmonic waves, Transverse and Longitudinal Waves, Propagation of waves, Linear polarization, Sound waves, The Classical Doppler effect.

  • Superposition of harmonic waves, Interference, Coherent waves, Standing waves, Beats


Electric charge and Electric Field

  • Conservation of charge, Coulomb's law

  • Electric field, Gauss' Law, Potential

  • Dielectric constant and energy density of the electric field, Capacitors, and Capacitance, etc.


Current and Magnetic field

  • Ohm's law, Internal resistance of source, Kirchhoff's laws, Joule's law, Work Current Resistance, Work and power of direct and alternating currents.

  • The magnetic field of a current, Lorentz force, Current in a magnetic field.

  • Ampere's law

  • Law of electromagnetic induction, Lenz's law, Magnetic Flux, Self-induction, Energy Density of Magnetic field, Inductance, Permeability.

  • Voltage and Current (series and parallel) Resonances, Resistors, Inductors and Capacitors in AC-circuits, Alternating current.


Electromagnetic waves

  • Generation by feedback and resonance, Frequency of Oscillations, Oscillatory circuit.

  • Wave optics, Diffraction grating, Diffraction from one and two slits, Bragg reflection, Resolving power of a grating.

  • Line spectra of gases, and Dispersion and Diffraction spectra

  • Electromagnetic waves as transverse waves, Polarizers, Polarization by reflection.

  • Resolving Power of Imaging Systems.

  • Black body and Stefan-Boltzmann’s law


Quantum Physics

  • The impulse of the Photon, and Photoelectric effect and energy and 

  • De Broglie Wavelength and Heisenberg's uncertainty principle



  • Principle of Relativity, Relativistic Doppler effect, Addition of velocities.

  • Energy, Momentum, Relation between energy and mass, Conservation of energy and Momentum, Relativistic identification of motion.

  • Simple applications of the Bragg equation.

  • Energy levels of atoms and molecules (qualitatively),  Absorption, Spectrum of hydrogen-like atoms emission.

  • Alpha- Beta-Gamma-Decomposition, half-life, and exponential decay, Absorption of radiation, Components of nuclei, Nuclear reactions, Mass defect, Energy levels of nuclei (qualitatively) 

FAQs (Frequently Asked Questions)

1. How to Download an INPhO 2021 Admit Card and Result?

The admit card of the INPhO 2021 exam is available through the online mode. The candidates can download the INPhO 2021 exam admit card from the HBCSE official website before the few dates of the examination.

The INPhO result of 2021 can also be downloaded from the HBCSE official website. The candidates can easily download the INPhO exam result by mentioning the details such as NSE roll numbers, date of birth, and the verification code. The date of birth format should be DDMMYYYY.

2. How to Enroll in the INPhO Exam 2021?

The candidates who are not aware of how to enroll for the INPhO exam 2021 can follow the steps given below. Here is the simple process to complete the enrollment exam for the INPhO exam 2021.

  1. Visit the HBCSE official website.

  2. Click on the Olympiad option which is available on the top of the HBCSE website.

  3. Then click on the upcoming events.

  4. Mansion the details such as NSE roll number, center code, DOB to enroll for the INPhO exam 2021.

  5. Students are required to select the examination center at the time of registration for the INPhO exam 2021.

3. What are the Reference Books for the  INPhO 2021?

The INPhO exam is the most competitive Physics exam in India with only 40 students selected from all over India. The INPhO exam does not require much understanding. A thorough understanding of +2 level concepts is more than enough. For clearing the INPhO exam, students definitely need aptitude skills to solve subjective questions.

Here are some of the INPhO reference books that can be used to clear the INPhO exam 2021.

  • Arihant INPhO, the old edition

  • Arihant INPhO, the new edition

  • The usual God book -IE Irodov

4. What are the Eligibility Criteria for the INPhO Exam 2021?

  • Students selected from the stage 1 NSEP exam are eligible for the INPhO exam.

  • The candidates who have represented India in the International Physics Olympiad exam last year, need not attempt for the first stage of the NSEP examination in Physics. They may be permitted on special requests to the  National Coordinator of the respective subjects to straightaway attempt for the Indian National Physics Olympiad INPhO) in case they satisfy eligibility criteria such as age, class, etc which are applicable for the Physics Olympiad exam.