The topic Atomic Structure is fundamental and important in Modern Physics for JEE Advanced. This topic helps to understand atoms, energy levels, and configurations of electrons. The topic of atomic structure includes key sub-topics like Bohr’s Model, quantum numbers, de Broglie’s hypothesis, atomic spectra, and photoelectric effect etc.
In the JEE Advanced exam, Atomic Structure generally weighs between 3% of the total marks in a Physics section, that means, it would have 2-3 questions across Paper 1 and Paper 2. The important topics include Bohr’s Model and the quantization of energy levels, Energy levels in hydrogen atoms and similar atoms, De Broglie’s wavelength and photoelectric effect in addition, Rydberg formula and spectral series (Lyman, Balmer series), Heisenberg’s uncertainty principle and quantum numbers. It is necessary to learn these topics as this topic is a scoring part in the JEE Advanced exam.
Must Check:
JEE Advanced Previous Year Question Paper
Modern Physics - JEE Advanced
Modern Physics is an important part of the Physics syllabus for JEE Advanced, most likely contributing 10-15% of the total marks. This syllabus consists of physical concepts that were revolutionized in the 20th century to give a new perspective on understanding the physical world. The more important topics that fall under the umbrella of "Modern Physics" include the Photoelectric Effect, Atomic Models, Nuclear Physics, Radioactivity, Dual Nature of Matter, and Binding Energy.
In JEE Advanced, you can expect around 5-6 questions from this section. It includes conceptual clarity and problem solving in Modern Physics. Nuclear Physics (calculation of Mass Defect and Binding Energy), Quantum Mechanics, and the Photoelectric Effect are important topics to focus on as questions frequently appear from those subjects.
Here are some of the most important JEE Advanced Previous Year Questions of Atomic Structure.
Question 1:
A hydrogen-like atom of atomic number \( Z \) transits from \( n = 4 \) to \( n = 3 \). The photon emitted from this transition is incident on a metal surface of threshold wavelength \( \lambda_{\text{th}} = 310 \, \text{nm} \). If the maximum kinetic energy of the emitted electron is 1.95 eV, find the value of \( Z \).
Question 2:
A particle of mass \( m \) moves in circular orbits with potential energy \( V(r) = Fr \), where \( F \) is a positive constant and \( r \) is its distance from the origin. Its energies are calculated using the Bohr model. If the radius of the particle's orbit is denoted by \( R \) and its speed and energy are denoted by \( v \) and \( E \), respectively, then for the \( n^{th} \) orbit (here \( h \) is Planck's constant):
Question 3:
A free hydrogen atom after absorbing a photon of wavelength \( \lambda_a \) gets excited from the state \( n = 1 \) to the state \( n = 4 \). Immediately after that the electron jumps to \( n = m \) state by emitting a photon of wavelength \( \lambda_e \). Let the change in momentum of atom due to the absorption and the emission are \( \Delta p_a \) and \( \Delta p_e \), respectively. If \( \lambda_a/\lambda_e = 1/5 \). Which of the option(s) is/are correct? [Use \( hc = 1242 \, \text{eV nm}; \, 1 \, \text{nm} = 10 \, \text{m}, \, h \, \text{and} \, c \, \text{are Planck's constant and speed of light, respectively}]
Question 4:
The wavelength of the first spectral line in the Balmer series of hydrogen atom is 6561 \( \text{Å} \). The wavelength of the second spectral line in the Balmer series of singly ionized helium atom is
Question 5:
Electrons with de-Broglie wavelength \( \lambda \) fall on the target in an \( X \)-ray tube. The cut-off wavelength of the emitted \( X \)-rays is
Question 6:
The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122 nm. The smallest wavelength in the infrared region of the hydrogen spectrum (to the nearest integer) is
Question 7:
A photon collides with a stationary hydrogen atom in the ground state inelastically. The energy of the colliding photon is 10.2 eV. After a time interval of the order of microseconds, another photon collides with the same hydrogen atom inelastically with an energy of 15 eV. What will be observed by the detector?
Question 8:
If elements with principal quantum number \(n > 4\) were not allowed in nature, the number of possible elements would be:
JEE Advanced Exam Pattern
The JEE Advanced exam is considered as one of the top engineering entrance examinations in India, which takes place annually for enrollment at IITs and other top institutions to undergraduate programs. JEE Advanced consists of two compulsory papers, Paper 1 and Paper 2, each with three hours of duration. It challenges students’ knowledge of Physics, Chemistry and Mathematics. The exam consists of different question types including Multiple Choice Questions (MCQs), Numerical Value-based Questions and Assertion-Reasoning questions to evaluate the foundational knowledge of topics and ability to solve problems. Both papers have a total of 180 marks, with marks deducted for incorrect answers in a few question types.
The exam is known for its challenging nature and is conducted in English and Hindi. It is essential to clear the JEE Main exam before appearing for JEE Advanced.
| Aspect | Paper 1 | Paper 2 |
|---|---|---|
| Subjects | Physics, Chemistry, Mathematics | Physics, Chemistry, Mathematics |
| Types of Questions | MCQs, Numerical Value-based, Assertion-Reasoning, Multiple Correct Answers | MCQs, Numerical Value-based, Assertion-Reasoning, Multiple Correct Answers |
| Marking Scheme | MCQs: +3 for correct, -1 for incorrect; No negative for Numerical Value-based | MCQs: +3 for correct, -1 for incorrect; No negative for Numerical Value-based |
| Total Number of Questions | Approximately 18-20 questions | Approximately 18-20 questions |
| Time Duration | 3 hours | 3 hours |
| Negative Marking | Negative marking for MCQs, no negative for Numerical Value-based | Negative marking for MCQs, no negative for Numerical Value-based |
Both the papers have same format and are conducted on same day.
Also Read:
JEE Advanced Physics Paper
The JEE Advanced Physics Paper is designed to assess a candidate's in-depth knowledge in Physics as well as their ability to solve problems. It consists of two papers which are Paper 1 and Paper 2. Each paper is for 3 hours and is made up of approximately 18-20 questions. Although the questions in both papers are related to a wide range of topics, including Mechanics, Electromagnetism, Optics, Thermodynamics, Modern Physics, Waves and Oscillations, and so forth, the syllabus for both papers is the same.
1. Types of Questions
The Physics section in both Paper 1 and Paper 2 includes a variety of question types:
- Multiple Choice Questions (MCQs):
These questions can have one or more correct answers. It gives +3 marks for correct answers, and -1 mark for incorrect answers.
- Numerical Value-based Questions:
These questions have a numerical answer with no negative marking.
- Assertion and Reasoning:
This type of question has a statement (assertion), followed by a reason. Candidates have to determine if both the assertion and the reason are correct, and if the reason explains the assertion. +2 marks is assigned for the correct answer, with no negative marking.
- Multiple Correct Answer Questions:
These questions may have more than one correct answer, and candidates need to select all correct answers to score full marks with partial marking for partially correct answers.
2. Marking Scheme
- MCQs: +3 marks for correct answers, -1 mark for incorrect answers.
- Numerical Answer Type (NAT): No negative marking.
- Multiple Correct Answer Questions: Full marks for correct answers and partial marking for partially correct answers.
- Assertion and Reasoning: +2 marks for correct answers, no negative marking.
3. Difficulty Level
The Physics Paper in JEE Advanced is considered highly challenging, which requires a deep conceptual understanding, problem-solving skills, and the ability to apply multiple concepts to solve complex problems.
Chapter-Wise Distribution and Weightage Analysis
The Physics subject in JEE Advanced includes a variety of subjects from the Class 11 and Class 12 syllabus. The weightage from each chapter varies within each subject. Below is the subject-wise weightage for Physics subjects and potential weightage in the JEE Advanced exam.
Class 11 Physics (Major Topics)
- Mechanics
- Topics: Kinematics, Laws of Motion, Work, Energy, Power, Rotational Motion, Gravitation, Fluid Mechanics.
- Weightage: Around 30-40% of the total Physics questions.
- Key Focus: Laws of Motion, Work-Energy Theorem, Moment of Inertia, Conservation of Angular Momentum, Gravitation (Universal Law, Satellites, Escape Velocity).
- Thermodynamics and Kinetic Theory
The key topics are Temperature, Heat, Laws of Thermodynamics, Kinetic Theory of Gases. It has around 10-15% of the total Physics questions.
Key Focus: First and Second Law of Thermodynamics, Efficiency of Heat Engines, PV Diagrams, Maxwell’s Distribution of Velocities.
- Waves and Oscillations
The topics are Simple Harmonic Motion, Wave Motion, Sound Waves. It covers around 5-10% of the total Physics questions.
Key Focus: Frequency, Amplitude, Energy of Oscillation, Speed of Waves, Doppler Effect, and Standing Waves.
- Fluid Mechanics
The key topics are Pressure, Buoyancy, Bernoulli’s Principle, Viscosity, Surface Tension. It covers around 5-10% of the total Physics questions.
Key Focus: Archimedes' Principle, Bernoulli’s Theorem, Capillary Action, Viscous Flow.
Class 12 Physics (Major Topics)
- Electromagnetism
Important topics of this unit are Electrostatics, Current Electricity, Magnetic Effects of Current, Electromagnetic Induction, AC Circuits. It has around 25-35% weightage of the total Physics questions.
Key Focus: Coulomb's Law, Gauss's Law, Capacitors, Ohm’s Law, Magnetic Fields, Faraday's Law, Lenz’s Law, and R-L-C Circuits.
- Optics
The important topics are Reflection, Refraction, Lenses, Optical Instruments, Wave Optics. It covers around 10-15% of the total Physics questions.
Key Focus: Ray Optics (Mirror and Lens Equations), Interference, Diffraction, and Polarization.
- Modern Physics
Subjects covered include the Photoelectric Effect, Atomic Models, Nuclear Physics, Dual Nature of Matter, and Radioactive Decay. It constitutes about 10-15% of total Physics questions and deals primarily with Quantum Theory, Rutherford's and Bohr's Models, Radioactive Decay, and Nuclear Reactions.
- Electromagnetic Waves
Essential topics are Electromagnetic Waves, Radio Waves, X-rays. These will make up about 5% of the total question in Physics.
Key Takeaways: Properties of Electromagnetic Waves, Uses of EM Waves, Communications.
| Topic | Weightage | Expected Number of Questions |
|---|---|---|
| Mechanics | 30-40% | 5-7 Questions |
| - Kinematics, Laws of Motion | ||
| - Work, Energy, and Power | ||
| - Rotational Motion | ||
| - Gravitation | ||
| Thermodynamics and Kinetic Theory | 10-15% | 2-3 Questions |
| Waves and Oscillations | 5-10% | 1-2 Questions |
| Fluid Mechanics | 5-10% | 1-2 Questions |
| Electromagnetism | 25-35% | 4-6 Questions |
| - Electrostatics, Current Electricity | ||
| - Magnetic Effects of Current | ||
| - Electromagnetic Induction | ||
| Optics | 10-15% | 2-3 Questions |
| Modern Physics | 10-15% | 2-3 Questions |
| Electromagnetic Waves | 5% | 1 Question |
Check: JEE Advanced Physics Syllabus
JEE Advanced Previous Year Question Papers with Detailed Solutions
JEE Advanced 2024 Question Paper Pdf with Solutions
| Paper Name | Question Paper Link | Solutions Link |
|---|---|---|
| JEE Advanced 2024 Paper 1 Question Paper (English) | Download PDF | Check Solutions |
| JEE Advanced 2024 Paper 2 Question Paper (English) | Download PDF | Check Solutions |
| JEE Advanced 2024 Paper 1 Question Paper (Hindi) | Download PDF | Check Solutions |
| JEE Advanced 2024 Paper 1 Question Paper (Hindi) | Download PDF | Check Solutions |
JEE Advanced Question Paper has 4 sections- Section 1 (Maximum marks-12), Section 2 (Maximum marks-12), Section 3 (Maximum marks- 24) and Section 4 (Maximum marks-12)
JEE Advanced Architecture Aptitude Test Question Paper 2024 with Solutions
| Paper Name | Question Paper Link | Solutions Link |
|---|---|---|
| Architecture Aptitude Test | Download PDF | Check Solutions |
JEE Advanced 2023 Question Paper PDF Download With Solutions
| Paper | Question Paper PDF | Answer Key PDF |
|---|---|---|
| Question Paper 1 PDF | Download PDF | Check Solutions |
| Question Paper 2 PDF | Download PDF | Check Solutions |
| Question Paper AAT PDF | Download PDF | Check Solutions |
JEE Advanced 2022 Question Paper
| 2022 Question Paper | PDF Download |
|---|---|
| Question Paper 1 PDF | Click here |
| Question Paper 2 PDF | Click here |
JEE Advanced 2021 Question Paper
| Question Paper | PDF Download | ||
|---|---|---|---|
| Question Paper 1 PDF | Physics | Chemistry | Maths |
| Question Paper 2 PDF | Physics | Chemistry | Maths |
JEE Advanced 2020 Question Paper
| Question Paper | PDF Download |
|---|---|
| Question Paper 1 PDF | Click here |
| Question Paper 2 PDF | Click here |
IIIT JEE Advanced Previous Year Question Papers
You can download free IIT JEE Advanced Previous Year Question Paper PDFs from the table provided below:-
| JEE Advanced Paper Name | Question Paper Link |
| JEE Advanced 2024 Question Paper PDF | Click Here |
| JEE Advanced 2023 Question Paper PDF | Click Here |
| JEE Advanced 2022 Question Paper PDF | Click Here |
| JEE Advanced 2021 Question Paper PDF | Click Here |
| JEE Advanced 2020 Question Paper PDF | Click Here |
| JEE Advanced 2019 Question Paper PDF | Click Here |
| JEE Advanced 2018 Question Paper PDF | Click Here |
| JEE Advanced 2017 Question Paper PDF | Click Here |
| JEE Advanced 2016 Question Paper PDF | Click Here |
Frequently Asked Questions
Q1. Is atomic structure important for JEE Advanced?
Answer. Indeed, Atomic Structure is an important topic for JEE Advanced. It contributes around 10-15% of the total Physics marks, with 2-3 questions expected. Key topics like Bohr’s Model, quantum numbers, and spectral lines are crucial for scoring well in the exam
Q2. Is modern physics important for JEE Advanced?
Answer. Certainly! Modern Physics holds a significant value for JEE Advanced as it contributes about 10-15% of the total marks in Physics. This marks of topic includes important chapters like Atomic Structure, Photoelectric Effect, Nuclear Physics, Binding Energy, etc. In any case, proving your mastery over this section is critical for performing well in this subject.
Q3. Is modern physics and atomic structure the same?
Answer. No, Modern Physics and Atomic Structure are related, but they are not the same. Modern Physics is a broad field that contains concepts such as the photoelectric effect, radioactivity, quantum mechanics, and nuclear physics, while Atomic Structure deals in concepts about the movement of electrons in atoms, Bohr's model, quantum numbers, and the atomic spectrum's spectral lines. While Atomic Structure is a concept found within Modern Physics, Modern Physics can encompass much more.
Q4. Is atomic structure a tough chapter?
Answer. The Atomic Structure chapter in JEE Advanced can be difficult for some students because the concepts are abstract and students should have an understanding of quantum mechanics and how electrons behave in atoms. If you understand all of the key concepts, such as Bohr’s model, quantum numbers, the lines of the spectrum, and the photoelectric effect, it is more manageable. Mastery of this chapter requires practice and strong conceptual understanding.
Q5. Can I get an IIT with 75 marks in JEE Advanced?
Answer. A score of 75 in JEE Advanced would probably fall short of the general cutoffs to enter the top IITs, particularly the most competitive branches such as Computer Science, Electrical Engineering, and Mechanical Engineering which generally require higher marks to qualify for admission.
Nonetheless, with a score of 75 marks, you may have some chance of getting admission into some IITs or other institutes such as NITs or GFTIs, especially in branches that are relatively less competitive, as well as other factors such as:
- The category (General, OBC, SC, ST, etc.)
- The opening and closing ranks of the year
- The specific IITs and branches you are targeting
Q6. Is 7000 rank good in JEE Advanced?
Answer. A rank of 7000 in JEE Advanced is acceptable, but it is likely not good enough for admission to IITs with branches like Computer Science, Electrical Engineering, and Mechanical Engineering that have a high demand. However, you will still have a chance to get into IITs or NITs in lesser branches, or if you are lucky, you can get selected through the extended merit list.
You may get admission into other GFTIs or into IITs into branches like Civil Engineering, Metallurgical Engineering, and Biotechnology, which all have lesser competition.
Although it may not be a top rank, you still have an opportunity to secure quality education in engineering, as you will also be exposed to different branches of engineering in reputable institutes.
Q7. Can I crack JEE Advanced in 1 month?
Answer. It can be tough to crack JEE Advanced in 1 month, but it can be possible with the right process and strategy, when you have a good knowledge and have been preparing for a long time. Here’s what you can do:
Concentrate on Varied Topics: Focus on slightly heavier weighed topics such as Mechanics, Electromagnetism, and Modern Physics. Revise result-giving chapters such as Atomic Structure, Thermodynamics, and Optics.
Practice JEE Advanced Previous Year Questions: Practice questions from previous years to perceive the exam and to increase accuracy and speed. This also helps you comprehend the kind of questions JEE Advanced asked.
Revise Formulas, Key Concepts, Short Tricks: Revise key concepts, short tricks, and important formulas. Keep notes to be concise and easier to revise.
Time Management: Schedule your day to manage each of the subjects well during the day, you need to revise completely and complete your problem-solving practice.
Also Read: JEE Advanced Preparation Tips
Mock Tests: Mock tests are often used to assess your improvement and weaknesses. Make sure to cover the weak areas and focus on those.
Consistency is Key: Studies as effectively each day and avoid burnout. Consistency is key and important.If you will have a good hold of the core -concepts and already prepared then-in a focused possible 1-month preparation time will get you enough concept mastery and skills to enhance performance.
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