Hi

If asking about Neet examination chapter wise weightage of Physics then it is given below for some chapters

Optics - 10% weightage

Semiconductors- 9%

Dual nature of matter ,atoms and nuclei-9%

Thermodynamics -9%

Electrostatics-9%

Current electricity -8%

Electromagnetic Induction & Alternating Current-8%

Laws of motion & work power energy-7%

Magnetic Effect of Current & Magnetism-5%

System of Particles and Rotational Motion-5%

For complete weightage Of all the chapters go through

https://medicine.careers360.com/articles/neet-chapter-wise-weightage-and-important-topics/amp

If you are asking about jee mains then

Modern Physics -20 marks

Heat and Thermodynamics-12 marks

Optics - 12 marks

Current Electricity- 12 marks

Electrostatics- 12 marks

Magnetics- 8 marks

You can get chapterwise weightage for all the chapters for each of physics Chemistry and Maths in jee mains by going through

https://engineering.careers360.com/articles/jee-main-syllabus-weightage

Thank you

Balaji, you haven't mentioned the exam you are enquiring about. But your user page says you are an Engineering aspirant. So, if it is for JEE Mains, here you go: In Physics, Modern Physics take the top slot with 5 questions. Heat and Thermodynamics, Optics, Current Electricity, Elcetrostatics get 3 questions each. Magentics has 2 questions and the rest get 1 question each. For complete breakdown, please read our article: https://engineering.careers360.com/articles/jee-main-syllabus-weightage . But if it is for any other exam, please do let us know.