Which branch should i opt if I love to study physics and mathematics ( but not chemistry )
Well if you love physics and maths then i think electronics and communication or mechanical branch would be best for you as it has physics as well as maths.
For information about ECE branch:
https://engineering.careers360.com/electronics-and-communication-engineering-0
For information about MECHANICAL ENGINEERING branch:
https://www.careers360.com/mechanical-engineering-course
It totally depends on your interest to choose a particular branch.I suggest you to go through the above link and try to analyse your interest area.
Good luck.

