B.Tech Mechanics

Yes in some institutes and No in some institutes, it's possible to study M.Sc. In Physics after B.Tech in Mechanical Engineering. But only few colleges are giving chance for B.Tech students like Delhi University. Do some research about colleges giving this chance and join accordingly.
You would only be accepted to a few institutions if you wanted to pursue an MSc in physics. Traditional universities will not even accept you for a master's degree in physics. Furthermore, btech mechanical engineering is solely based on basic classical mechanics or lower level classical mechanics, the majority of which is newtonian mechanics.
BSc physics is focused on quantum mechanics, and almost all areas of study in BSc physics use quantum mechanics like there isn't any newtonian mechanics in the universe, so whatever they would be thinking in India about degree equivalence, a BSc physics is way higher than a btech mechanical engineering in terms of theoretical knowledge and depth of physics and mathematics, in fact, a BSc physics is way higher than btech, So, if you get into one of those select few universities, you'll have to work extremely hard or you'll end up in hell. Also, if you want to study physics overseas, a btech is ineligible for an MSc or MS in physics. Only those with a BSc/BS in physics are eligible. As a result, you won't be able to pursue an MSc in another country because their qualifying standards only allow for BSc/BS physics.

LPU is the best private university for an MBA in Marketing. Let me share details of LPU. The Business School of LPU is accredited by ACBSP, Accreditation Council for Business Schools and Programs from the USA ensuring quality education and industry-experienced faculty members, studying in LPU will get a degree accredited from a body of USA. LPU is ranked No. 2 among Indian B-Schools in 'Outreach and Inclusivity by NIRF ranking released by MHRD, Government of India. Placement: Every year more than 550+ companies visit LPU for placements. LPU has a very good placement and achieved awards for employability also. The main thing for placement that I liked there, LPU provides placement classes to the students from the very first year which helps students to be prepared for placement till their final year of the programme. Scholarships: LPU provides very good scholarships to bright students who have a good academic record, sports, or extracurricular activities achievement. LPU also helps students in the Education loan facility. Faculty: All faculty members are well qualified from IITs, NITs, Iims, and top-ranked universities all over the world. Infrastructure: All the facilities are available on the campus itself, a student does not need to go outside for anything. On the campus, Central Library, Hospital facility is available 24*7 for staff and students, Shopping mall, Indoor Sports Stadium with 3 Olympic size Swimming Pools, Public/Private Sector Banks, ATM, etc. Ranking:
1. For Focus on Affordable and clean energy, LPU has 1st rank in India
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3. Among the top 80 Universities in India
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7. LPU ranks amongst the Top 200 universities of the world as per the prestigious Times Higher Education Impact Rankings 2021, which assess universities against the United Nations Sustainable Development Goals (SDGs). I hope this helps.