Hello there

These 3 colleges are private ones and all of the are equally good for bsc physics honours .It's hard to compare but if asked then I will arrange them in this order of preference SRM,chandigarh university,and last amity university .

I was also a physics honours student .Since you want to study in abroad after your bsc so focus on few things like ,first your grades (should be above 8cgpa) ,you should also need to have good IELTS or GRE grades which will help you a lot .Extra curricular activities and publishing few research papers (will help but not necessary) .With all these and of course with some good finance options you will be able to pursue your further studies .