Hello

Yes you can do MBA after Bsc physics and the eligibility criteria for CAT examination is that you must holds a bachelor's degree and in that you need to get atleast 50% marks.After Bsc physics, you can also choose HR & Finance.In these HR is a good choice why because it doesn't require any other specialised qualification unlike finance.here is the link to get information about mba colleges.

https://www.bschool.careers360.com/mba-college-predictor

All the best.