Physics Spl

As per your interest, this would be best. If you like, you may join Engineering Physics for B.Tech program.

Seems like you are qualified.
If you have got CRL rank in JEE Advanced, then you are definitely eligible for counseling.
https://www.resonance.ac.in/reso/news/jee-advanced-branch-allotment.aspx
Check this branch and IIT college predictor.

Electrical engineering is physics orientation branch In engineering. So, if you are interested in physics then you should take admission in a good University/college with this branch.

As you are doing B.Sc Honours in physics, it means that you are doing specialisation in physics, it it somewhat equalent to B.Tech in ME. Further, you can go PG (M.Sc) or you can opt for teaching career.

Chemistry. No type of engineering can match it. It is unique as well as provides broader options with physics, engineering people will always compete with you.

Physics graduates and post graduates have better opportunities in comparison to Maths graduates and postgraduates. Majority of job opportunities in Maths is in academic and Data Analytics roles in Government and Business where Physics students in addition to academics, research are also employed in all type of engineering firms. Physics professional can easily specialise in field such as Space, Communication, Electronics, etc.

You may refer to following link for DTU B.Tech syllabus:
http://dtu.ac.in/Web/Academics/syllabus.php

First of all, congratulation for your massive result. If you want to do physics honors, please go through the admission criteria in JU, then fill up the form quickly and wait for merit list to be published.

You can do it from any prestigious institutions. Bachelors in such subjects will not make any difference, whether you pursue from a state university or from a central. Cracking it to the IIT will be exceptional keep in mind.