IAT 2026 Physics Important Topics & Chapters: The Indian Institutes of Science Education and Research Aptitude Test (IAT) 2026 serves as the primary gateway for undergraduate admissions to IISERs, IISc Bangalore, IIT Madras, IIT Guwahati, IIEST Shibpur, and IACS Kolkata. Students can gain admission to research-oriented courses through this exam.
The IAT 2026 question paper includes questions from four subjects: Physics, Chemistry, Biology, and Mathematics.
Among all the subjects in IAT 2026, Physics plays a crucial role in determining the overall score because it tests conceptual clarity, analytical thinking, and problem-solving skills.
Most questions are based on Class 11 and 12 NCERT concepts, but the exam often includes application-based and multi-concept problems.
To score well in the Physics section, candidates should focus on high-weightage chapters, frequently asked topics, and regular numerical practice.
This article covers the important Physics topics for IAT 2026, a chapter-wise priority list, the best books, and preparation tips.
IAT Exam Pattern 2026
According to the latest IAT exam pattern, the examination will be conducted in Computer-Based Test (CBT) mode on June 7, 2026.
The paper includes questions from Physics, Chemistry, Mathematics, and Biology.
To know all the important details about the exam, refer to the following IAT 2026 exam pattern:
Particulars | Details |
Mode of Exam | Online (Computer-Based Test) |
Duration | 3 Hours |
Total Questions | 60 Questions |
Subjects | Physics, Chemistry, Mathematics, Biology |
Questions per Subject | 15 Questions |
Question Type | Multiple Choice Questions (MCQs) |
Marking Scheme | +4 for correct answer, -1 for incorrect answer |
Total Marks | 240 Marks |
Also Read:
IAT Exam Pattern 2026 (Detailed)
IAT 2026 Physics Important Topics & Chapters
SciAstra has a team of experts that includes mentors who are alumni of IISERs, NISER, IITs and IISc. The team analyses the previous years’ question papers of the IISER Aptitude Test from 2017 to 2025. This analysis allows them to identify the important topics and chapters from which questions have been frequently asked in the exam.
Based on this analysis, the most important topics and chapters have been mentioned here.
IAT 2026 Physics Important Topics List
The most important Physics topics for the IAT 2026 exam are the following:
Highest Weightage Topics
Rotation → 13 questions
Electrostatics → 13 questions
Modern Physics → 13 questions
Thermodynamics → 10 questions
Frequently Asked Topics
Simple Harmonic Motion → 8 questions
Current Electricity → 8 questions
Magnetism → 7 questions
Laws of Motion → 6 questions
Moderately Important Topics
Waves → 5 questions
System of Particles → 5 questions
Low Weightage Topics
Ray Optics → 3–4 questions
Electromagnetic Induction → 3 questions
Alternating Current → 2–3 questions
Kinetic Theory of Gases → 2 questions
Semiconductors → 2 questions
Units & Dimensions → 1–2 questions
Communication Systems → 1 question
IAT 2026 Physics Important Chapters
As per the analysis, the most important chapters for the Physics section are Mechanics and Electricity, as a total of 20.8% of questions each have been asked from them in the IAT from 2017 to 2025.
The second most important chapter is Electromagnetism, with a weightage of 11.7%. The weightage of Modern Physics is 38%.
The chapter-wise weightage distribution is available as follows:
IAT 2026 Best Books for Physics
Candidates must select IAT preparation books for Physics that meet these criteria:
Based on the IAT exam pattern
Aligned with the IAT syllabus
Provides detailed topic-wise weightage analysis
Covers all important topics for the exam
Includes trend analysis of frequently asked topics and repeated questions from previous years
Designed by experienced IAT preparation mentors
SciAstra's IAT books meet these criteria and offer highly beneficial, structured preparation. These books are listed below:
Best Books for IAT Chemistry Section Preparation | |
Book | Features |
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IAT 2026 Physics Preparation Tips
IAT 2026 aspirants can use the following tips to prepare for the Physics section:
1. Build Strong Concepts
IAT questions are usually concept-oriented rather than purely formula-based. Therefore, you should focus on understanding the logic behind derivations and physical phenomena.
2. Prioritise High-Weightage Chapters
Complete Mechanics, Electricity, Thermodynamics, and Modern Physics first because these chapters contribute significantly to the exam.
3. Practice Numerical Problems Daily
Physics includes numerical problems. If you know all the concepts of the IAT 2026 Physics syllabus, solving numericals can be easy for you.
4. Revise Formulas Regularly
Prepare a short formula notebook for quick revision before mock tests and the actual exam.
5. Solve Mock Tests
Attempt full-length mock tests regularly to improve the following:
Speed
Accuracy
Time management
Question selection strategy
6. Analyse Mistakes
Take the IAT mock test regularly. After every mock test:
Identify weak chapters
Revise incorrect concepts
Reattempt unsolved questions
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Conclusion
Physics is one of the most important sections of the IAT 2026 exam. Candidates aiming for a high score should focus on conceptual understanding, regular numerical practice, and revision of high-weightage chapters such as Mechanics, Electricity, Electromagnetism, and Modern Physics.
A smart preparation strategy combined with consistent mock test practice can significantly improve performance in the Physics section. Begin with NCERT fundamentals, strengthen concepts through standard reference books, and regularly practise previous-year questions to maximise your score in IAT 2026.
