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If you’re preparing for JEE-Main 2017 then it’s always advisable to have a plan. One of the first steps is to understand the JEE- Main syllabus and understand the weightage given to each topic in the question paper. Today we’re focusing on an important topic of Modern Physics i.e. Thermonuclear Fusion that has approximately 5% weightage in the JEE-Main paper.

Thermonuclear Fusion has multiple practical applications and we are still at an experimental stage as far as nuclear fusion reactions are concerned. Some of the applications of Thermonuclear Fusion are:

  • It can be used as a vast source of energy with the help of a nuclear fusion reactor to generate power and electricity, to power virtually anything.
  • It can also be used to make nuclear weapons, commonly known as the Hydrogen bomb.
  • If utilised properly, nuclear fusion is the answer to the world’s power crisis problem. It is clean and produces a minimal amount of nuclear waste as compared to fission reactions. The fuel for fusion, Deuterium and Tritium, are also readily available in nature.  Scientists are hopeful that in the coming centuries, fusion will be a viable alternative power source.

Modern Physics is the easiest and most scoring topic in JEE Physics. Generally, each year there are two-three questions from this topic in the JEE question paper. Hence, mastering Thermonuclear Fusion would go a long way in getting a good score. The questions asked in the exam are quite conceptual and easy if you understand how the energy is really generated in Thermonuclear Fusion reactions (binding energy concept applied to fusion reaction), what fuels can be use in such reactions (e.g. Hydrogen, Deuterium, tritium, etc.), and what are the Thermonuclear Fusion reactions.

I would suggest you solve a lot of JEE previous years’ papers and familiarise yourself with the concepts asked in the exam from this topic. It’s been observed that most of the concepts get repeated every year.

For reading purpose you may refer, physics NCERT class 12th books.

Some key points that you should work on when studying Thermonuclear Fusion are:

  1. Fuels useful in Thermonuclear Fusion.
  2. Atmospheric conditions like temperature, etc required to carry out controlled fusion reactions.
  3. Binding energies of fuels and the products of the fusion reaction (This will help in finding out the energy produced during the reaction).
  4. Fusion reaction on the Sun.
  5. How to contain/confine the hot plasma.
  6. The concept of 1 MeV.
  7. How to use E= mc2 ? A very useful equation for such topics which is often used incorrectly.

Please note that this is not an exhaustive list, however, having all the aforementioned knowledge will help you in the exam.

Want to learn more? Follow us here for more expert advice. Thermonuclear Fusion is a small part of the JEE syllabus. You can also go through our experts’ advice on cracking calculusmechanics, and light and sound.

All the best!



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