Civil Engineering

Graduates may go for technical as well as Diploma courses such as piping technology, safety management, etc. They may also go for M.E./M.Tech. programmes and specialise in job oriented disciplines and sub branches within the field of civil engineering. Masters Degree programmes in disciplines such as structural engineering, civil engineering (general), transportation engineering, coastal structures engineering, construction management, etc. will help one increase ones qualifications and value in the job market.
MBA programmes focusing on construction management field is also an excellent option that graduates may pursue.

Without physics, it's impossible. You have to calculate force at different angle at every stage. If you don't love physics, civil engineering will be quite tough for you.

If you are still wanting to go for B.Tech and not getting any government college or good private college the GLA University is a good option for you. You can join this for further study in B.Tech.
All the best!

If you want jobs then mechanical, electrical and chemical are great choices.