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Modern Physics for JEE

The JEE is the sole gateway for admission in India’s premier engineering colleges–the IITs. The JEE is also known as one of the toughest examinations in the world. So when it comes to appearing for such an examination, one should work smart AND work hard. Most students work hard, but hard work is no longer sufficient to crack the JEE when you have more than a million competitors. So work smart while working hard!

I can tell you, one can complete the whole Modern Physics JEE course in just a month or less than that, depending on how much time he/she is putting in every day. It is a scoring topic and requires less efforts compared to other chapters. First things first, what’s the syllabus?

Syllabus

The syllabus includes all of the following:

  • Atomic Nucleus
  • Alpha, Beta, and Gamma Radiations
  • Law of Radioactive Decay
  • Decay Constant
  • Binding Energy and its calculation
  • Fission and Fusion processes
  • Energy Calculation in Fission and Fusion Processes
  • Photoelectric effect
  • Bohr’s theory of hydrogen-like atoms
  • Characteristic and continuous X-rays
  • Moseley’s law
  • De Broglie wavelength of matter waves

Weightage

This is the only topic which will surely carry 10 – 14% of the total questions. If you are lucky enough, you will get more than that. I am saying this because it is not a difficult topic. So, the more questions, the more opportunity you have to score.

modern physics jee, pick up points - magoosh

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The chapter on Modern Physics JEE Main is one of the highest scoring topics. It makes up about 14% of the total number of questions. Sometimes, questions are also repeated in the JEE from this topic. The numericals from this chapter are not too difficult, as the level generally lies between easy to moderate difficulty.

Important Topics

Some of the most important topics are Photoelectric effect, Bohr’s theory of hydrogen-like atoms, and De Broglie wavelength of matter waves. One should, however, not leave the other topics unattended as modern physics is an easy to score section and does not take much time to cover. Semiconductor Devices and Communication Systems are the chapters which are present only in the JEE Main syllabus, and one will find questions from these topics almost every year.

Students generally neglect logic gates, which is a subtopic in Semiconductor Devices. But this is an important topic from a competition point of view–as even a difference of a single mark might decide whether you get your desired branch in your desired institution.

Books

For Semiconductor Devices and Communication Systems, one should cover NCERT books thoroughly. Be aware that even most of the institute teachers don’t take these two chapters seriously, so you must cover these chapters on your own if you’re aiming for a top rank. Sometimes, examples of NCERT have directly showed-up in the JEE Main from these chapters.

For other topics, one should read the following books

  • NCERT (Read at least once)
  • HC Verma
  • DC Pandey or BM Sharma (anyone)
  • IE Irodov / SS Krotov (optional)

Previous Years’ Questions

After solving these books you should go for previous years’ questions. One should solve the previous year archives for Physics and all other subjects because almost 10 – 20% of the paper will be similar to questions which have come in previous years, particularly for the JEE Main. Even if some questions are not based on previous years’ questions, at least you will get confidence because you were able to solve questions which came in the JEE before.

Now, we come to the most important subtopic of this article.

Specifics on How You Should Prepare for Chapter on Modern Physics JEE

How should you study? How much time should you give to each topic? And what is the perfect method to retain Modern Physics JEE (or any related topics) in your mind?

Notes

I would suggest you make notes. Because notes are very helpful at the time of revision. You will revise the whole topic in much less time and you can carry your notes anywhere. Let us start:

  • Day 1: Atomic Nucleus Theory
  • Day 2: Atomic Nucleus Theory and Problems
  • Day 3: Atomic Nucleus Problems
  • Day 4: Alpha, Beta, and Gamma Radiations Theory
  • Day 5: Alpha, Beta, and Gamma Radiations Problems
  • Day 6: Law of Radioactive Decay, Decay Constant, Half-life and Mean-life Theory
  • Day 7: Law of Radioactive Decay, Decay Constant, Half-life and Mean-life Problems
  • Day 8: Binding Energy and its calculation, Fission and Fusion Processes, Energy Calculation in these Processes Theory
  • Day 9: Binding Energy and its calculation, Fission and Fusion processes, Energy Calculation in these Processes Problems
  • Day 10: Photoelectric Effect Theory
  • Day 11: Photoelectric Effect Problems
  • Day 12: Bohr’s Theory of hydrogen-like atoms
  • Day 13: Bohr’s Theory of hydrogen-like atoms and problems
  • Day 14: Bohr’s Theory of hydrogen-like atoms problems
  • Day 15: Characteristic and Continuous X-rays, Moseley’s Law Theory
  • Day 16: Characteristic and Continuous X-rays, Moseley’s Law Problems
  • Day 17: De Broglie Wavelength of Matter Waves Theory
  • Day 18: De Broglie wavelength of Matter Waves Problems

Maintain Balance in Studying and Modification

Give 4 days to semiconductor devices and communication systems.

The idea is to alternately read theory and solve problems so as to maintain the right balance.

You can modify this strategy according to your comfort and convenience, but try to give sufficient time to every topic. Now, after completing the whole syllabus of Modern Physics JEE, the next thing that is important is regular revision. Let’s talk about how to revise modern physics or any other subject.

Revision

If you have followed the above strategy, it will take much less time to revise. The best strategy for revision is that you should revise every weekend. If you revise frequently, you will have no fear of tests in coaching. I would suggest you revise notes on every Sunday. This should leave you with a strong grip over what you have studied before. I suggest you follow this revision technique for every subject as it is very helpful.

Time Management

modern physics jee, time management - magoosh

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In JEE preparation if you are not managing time, you are not preparing at all. Everybody has heard time management is the key to success. But, how many of us apply this to our daily lives? I guess those who apply this are successful.

You have to manage your time because you will have a lot to study in a very limited time. I would suggest you make a timetable. The timetable should include time for outdoor activities too because a healthy mind resides in a healthy body. Don’t exhaust yourself. Studies should be your first priority but give time to other things as well.

Now, that was all about Modern Physics. I have tried to cover all the topics that you should keep in your mind to excel in Modern Physics for the JEE. I would again emphasize not ignoring this topic as it is high scoring and easy.

I know JEE is one of the toughest examinations, but do not get bothered about that. Focus on yourself. If you keep focusing on the fact that the JEE is difficult, or that you have a lot of competitors–it will only negatively affect your performance. Don’t think about unnecessary things. Just focus on learning as much as you can, and you will eventually do well.

modern physics jee, journey - magoosh

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I know getting into an IIT is a beautiful thing! But it is not the only beautiful thing. Preparation for the JEE is a stressful journey but remember–it’s about the journey, not the destination. You will come to learn many things in this beautiful journey.

All the best for future!

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