Physics stays only in the first year for btech CSE. You have little subjects and physics is pretty easy as compared to what you've already studied and come for jee and cet. You have topics like semiconductors, light and waves, magnetism, electronic radiations, mechanics, etc only.

Refer to the site below to know about the same in detail..

https://www.careers360.com/courses/computer-science-engineering-course

Best wishes. Thank you.