If you can't live without mobile phones, TVs, and hot food, all of which rely on the application of electromagnetic waves, then how can you make the mistake of ignoring this topic in the JEE Mains 2026 syllabus?
- Although it has a low weightage (3–7% in Physics), covering the electromagnetic spectrum and the characteristics of EM waves can help you answer 1–2 questions in the exam.
- The conceptual understanding and formulas of EM waves can be applied to other chapters as well, such as Modern Physics and Wave Optics.
- Therefore, understand its importance, as skipping this chapter could lead to unnecessary losses in the JEE Main 2026 exam.
- JEE Main 2026 syllabus with chapter-wise weightage & deleted topics (PDF)
- Take the December Mock Test for JEE Main to improve your score before the session 1 exam
Most Important Electromagnetic Waves Topics for JEE Main 2026
- In the JEE exam, you don't need to master every single topic; you just need to cover the chapters with the highest weightage first and then analyse which chapters can fetch you good marks with less effort.
- In JEE Mains 2026, the topic-wise weightage of the Electromagnetic Radiation chapter will be between 10% and 20%.
| Topic | Expected Weightage (%) |
|---|---|
| Displacement Current & Maxwell's Equations | 15-20 |
| Characteristics of EM Waves (Transverse nature, Speed, Energy density) | 25-30 |
| Electromagnetic Spectrum (Order, Wavelength ranges, Sources & Uses) | 30-35 |
| Production and Propagation of EM Waves | 10–15 |
| Application of EM Waves | 10–15 |
Read Also: Check the last-minute revision notes on Electromagnetic Waves for JEE Mains 2026
Ques: What is the difficulty level of EM Waves questions in the JEE Main exam?
Ans: According to the JEE Main 2025 paper analysis, the questions asked from Electromagnetic Waves were of a mixed nature. Some shifts included numerical problems on the relationship between E (electric field) and B (magnetic field), wave propagation, and direction.
- In other shifts, direct questions were asked about the applications and properties of electromagnetic waves in the JEE Main 2025 exam.
- Therefore, the difficulty level of the questions in this section ranged from easy to medium.
Read More: Take the Physics sectional mock test to improve your speed and accuracy
Electromagnetic Waves Weightage Trend: Last 5 Years Analysis
In the last five years, the JEE Main exam has included 1-2 theory-based questions, which were mostly from NCERT textbooks. Skipping this easy-scoring section can cost you 8–10 marks unnecessarily.
| Year | Approx. Questions | % of Physics Section |
|---|---|---|
| 2021 | 1-2 | 3-7% |
| 2022 | 1 | 3-4% |
| 2023 | 1-2 | 3-5% |
| 2024 | 1-2 | 3-4% |
| 2025 | 1-2 | 3-4% |
| Year | Question Paper PDF | Solution PDF |
|---|---|---|
| 2024 | Download | Check Solutions |
| 2023 | Download | Check Solutions |
| 2022 | Download | Check Solutions |
| 2021 | Download | Check Solutions |
| 2020 | Download | Check Solutions |
Ques: How many questions were there from the EM Waves chapter in the JEE Main January and April sessions?
Ans: Based on memory-based analysis and the question papers from all shifts, the questions asked from Optics were as follows:
| Session | Number of Questions (Approx.) | Question Type |
|---|---|---|
| January (Session 1) | 8–10 (Across all shifts) | Numericals on Electric and Magnetic Fields in EM Waves, Displacement Current, Wave Propagation) |
| April (Session 2) | 1–2 (Multiple shifts) | Mixed (Numericals and conceptual on properties of EM Waves) |
Reddit & Student Insights: What Aspirants Say About Electromagnetic Waves
As per experts and toppers, EM Waves in the JEE Mains Physics syllabus is considered an easy and scoring chapter.
- “Covering this chapter from a one-shot video is sufficient for revision.”
Source: Reddit
Another user posted that,
“The NCERT Physics Book is sufficient for covering the most frequently asked topics from this section.”
Source: Quora
| Electromagnetic Waves JEE Main PYQ - 1 Mock Test | Electromagnetic Waves JEE Main PYQ - 2 Mock Test | Electromagnetic Waves JEE Main PYQ - 3 Mock Test |
How to Prepare Electromagnetic Waves for JEE Main 2026 (Expert Strategy)
| Tips | Details |
|---|---|
| Concept clarity first (NCERT reference) |
|
| Formula & constants list |
|
| PYQs (minimum years to attempt) | Solve the last 10-15 years PYQsFocus on 2021-2025 for recent trends |
| Chapter-wise MCQs target (number) | 150-200 MCQs (theory + numerical)50 from spectrum & applications |
| Last week's revision approach | Revise NCERT summary & formulas dailySolve ro-30PYQs/topicQuick recall of spectrum uses &order |
Read More: Practice these important questions on EM Waves to test your accuracy
Ques: How much time should I dedicate to the Electromagnetic Waves chapter to correctly answer the questions from this chapter in the JEE Main 2026 exam?
Ans: Accuracy isn't determined solely by the number of hours you dedicate to a particular section. Rather, it's determined by the results you achieve in the end. Speed and accuracy are maintained through consistent practice and thorough review of mock tests. In summary, the time allocation is as follows:
| Level | Time (in hours) |
|---|---|
| Beginner | 10 Hours (Start with NCERT Physics Class 12 for concept building) |
| Intermediate | 5 Hours (Practice Focussed) |
| Advanced | 2–3 Hours (Revision only) |
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