Hello
Indian Institute of Managements (IIMs) provide masters in business administration (MBA) course to students who completed their bachelors in any discipline.
A MBA degree from IIMs offers a great opportunity to work for top MNCs, PSUs in the country and outside the country too.
B.Sc Physics on the other hand is a undergraduate course which specialises one in physics. That being said, students from engineering and science backgrounds have secured top ranks in CAT (common admission test) throughout the years.
So, your graduation degree is irrelevant in MBA as it just makes you eligible for admissions.

For more follow this link-
https://bschool.careers360.com/articles/cat
Good Luck