hey,

the weightage of physics for JEE mains are

1. modern physics - 20 marks

2. heat and thermodynamics - 12 marks

3. optics - 12 marks

4. current electricity - 12 marks

5. electrostatistics - 12 marks

6. magnetics - 8 marks

7. unit dimensions and vector - 4 marks

8. kinematics - 4 marks

9. kinematics - 4 marks

10. laws of motions - 4 marks

11. work , power and energy - 4 marks

12. centre of mass , impluse and momentum - 4 marks

13. rotation - 4 marks

14. gravitation - 4 marks

15. simple harmonic motion - 4 marks

16. solids and fluids - 4 marks

17. waves - 4 marks

18. electromagnetics induction ; AC - 4 marks

for chemistry and chemistry kindly go through the link

https://medicine.careers360.com/articles/neet-eligibility-criteria

all the best!