MSC physics : I'm doing my BSc Applied science.. Am I eligible for MSc physics??

It varies from college to college. It will be more appropriate to know the colleges where you want to apply so that we can give you accurate information.

It is important to understand that most of the top colleges offering M.Sc in Physics have very high eligibility criteria. Following are the degrees accepted by the top colleges offering M.Sc Physics:

• M.Sc. in Mathematics / Applied Physics / Applied Mathematics / Optics and Photonics / Instrumentation / Electronics will also be considered at IIA.
• B.E. or B.Tech. will be considered at IISc, IMSc, ICTS-TIFR, IUCAA, JNCASR, NCRA-TIFR, TIFR-TCIS, RRI, IISER Mohali, IISER Pune, IISER Thiruvananthapuram.
• M.Sc. in Physics / Electronics / Astronomy / Applied Mathematics will be cnsidered at IUCAA.
• MSc  in Physics, Engineering Physics or Applied Physics will also be considered at IPR.
• M.Sc. in Physics, Chemistry, Applied Mathematics, Biophysics or Biochemistry will be considered at SNBNCBS.
• B.Tech Eng. Phys.will be considered at TIFR

This is just for some for the colleges mentioned above. For a detailed course requirement you must check at the official college website of the institute where you want to apply.