Hello,
If you are studying in the 1st year of engineering course and want to change the branch after completing 1st year of engineering i.e in the 2nd year then you can change the branch in 2nd year if your CGPA in the first year is minimum 8.5 or above and there are no backlog in any paper of 1st year. If you satisfy the above eligibility criteria then you can change the branch after completing 1st year of engineering.

So, If you want to change the branch after 1st year of engineering then do hard work and get a good marks because if your CGPA is less then 8.5 then you are not eligible to branch change after completing 1st year of engineering.
Best wishes....